Smithchart匹配习题
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高考英语二轮复习专题训练:信息匹配(69)阅读下列应用文及相关信息,并按照要求匹配信息。
阅读下列材料,从所给的六个选项(A、B、C、D、E和F)中选出符合各小题要求的最佳选项,选项中有一项是多余选项。
The people below are all looking for a hotel in Spain for their holidays. After the description of thesepeople, there is information about six Spanish hotels A—F. Decide which hotel would be most s u i t a b l e f o r the people mentioned in questions 61-65 and then mark the correct letter(A—F) on your answer s h e e t. There is one extra paragraph about one hotel which you don’t need to use.1. Jackson wants to do several all-day hikes in the mountain during the spring. He is very fond of aplace where he can enjoy traditional decoration and fine and wonderful views.2. Anna and her two children aged six and ten will spend July in Spain. The children are interestedin animals and plants while the mother enjoys all kinds of updated fashions.3. David is a disabled teacher with a comparatively low-income, who must use a wheelchair butdrives his own car. He enjoys swimming, concerts, museums as well as fine architecture. He will spend the first two weeks of October in Spain.4. Bob, Alice and their one-year-old daughter want to be in a quiet place in August where theycan enjoy nice food, and take long walks with the baby in the backpack. They intend to have a pleasant holiday both indoors as well as outdoors.5. Mrs. And Mr. Black, aged 65 and 68, love mountain scenery and still take easy walks by thelakeside whenever they can. Also, they are eager to go fishing or boating on the water with a little activities that get them relaxed.A. Madrid Post HouseA popular base for visitors from all over the world. This fine hotel stands next to the zoological gardens within easy reach of many famous sights, shops and entertainments of any of the Europe’s most famous c apitals.B. Royal Rose HotelThis impressive hotel, well-known for its good Spanish cooking, is an ideal choice for a relaxing family holiday. Set in 100 acres of private grounds, the Cally, a former stately home, has something for everyone including its own fishing lake, outdoor heated swimming pool, green lawn, tennis court, children’s playground and sauna baths.C. Golden Caste HotelThere can be few of the places for a refreshing holiday than this picturesque hotel set in its own 120 acres of beautiful countryside by a charming lake. The hotel provides guests with fishing boats and baits. So floating on the water while fishing can be more than relaxing.D. New Barcelona HotelA unique feature of the hotel is its fine collection of antique (古董) furniture, china and glass. This friendly comfortable hotel, a favorite meeting place for the townspeople, is a super base for getting to know the famous Spanish city – Barcelona.E. Red Star HotelThe hotel had a fascinating history – it was built in 1808. This homely hotel has been intended to make it a really comfortable base for exploring the Valley nearby and the attractive country not far away. Try your luck and you might find out lots of add rocks and precious stones as an explorer.F. North Hill HotelThis fine hotel is close to the city theater and museums. The hotel has its own open-air swimming pool and saunas. Madrid, well-known for its art festival, is only some 24 miles away. More importantly, it charges low fees – as it is supported by an organization of charity.DAFBC。
高考英语二轮复习专题训练:信息匹配(77)阅读下列应用文及相关信息,并按照要求匹配信息。
第二节:下面文章中有五处(第1-5题)需要添加小标题。
请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题。
选项中有一项是多余选项。
A. Use business recordingsB. Speak slowly and clearlyC. Learn telephone mannersD. Practice often with a friendE. Always be considerate of your friendsF. Make sure you understand the other speakerTelephone tipsIf the phone rings and someone speaks in English, don’t be afraid to answer it! The fear of talking on the phone in a second language will disappear if you practice often. Here are a few tips for helping you improve your ability to answer a call in English. 1._______________Listening to someone speaking in a second language over the telephone can be very challenging because you cannot see the person you are trying to hear. However, it may be even more difficult for the person you are talking with to understand you. You may not realize that your pronunciation isn’t clear because your teacher and fellow students know and understand you. Pay special attention to your weak areas of your pronunciation when you are on the phone.2._______________Don’t pretend to understand everything you hear over the telephone. Even native speakers ask each other to repeat and confirm information from time to time. This is especially important if you are taking a message for someone else. Learn the appropriate expressions that English speakers use when they don’t hear something properly. Don’t be afraid to remind the person to slow down more than once. Keep your telephone in an area that is away from other noise distractions such as a radio or television.3._______________.Ask another student to practice talking on the phone with you. You might choose one night a week and take turns phoning each other at a certain time. Try to talk for at least fifteen minutes. You can talk socially, or role play different scenarios in a business environment. The most important thing about practicing telephone English is that you are not able to see each other’s mouths.4. _______________.There are many ways to get free telephone English practice. After business hours, you can call and listen to recorded messages. Write down what you hear the first time, and then call back and check if your notes are accurate. Make sure you have a pen handy so that you can repeat the information and check your comprehension.5._______________.The way that you speak to your best friend on the phone is very different from theway you should speak to someone in a business setting. Many speakers make the mistake of being too direct on the telephone. It is possible that the person on the other line will think that you are being rude on purpose if you don’t use formal language in certain situations. Sometimes just one word such as could or may is necessary in order to sound polite. Take the time to learn how to answer the phone and say goodbye in a polite manner, as well as all the various waysone can start and end a conversation casually.Listening to someone on the telephone is like listening to a taped recording in class. The only difference is that you have to talk back! Follow the tips above and remember that practice makes perfect!BFDAC。
高考英语二轮复习专题训练:信息匹配(94)阅读下列应用文及相关信息,并按照要求匹配信息。
下面文章有5处(第1-5题)需要添加小标题。
请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题, 选项中有一项是多余选项。
A.The world is running out of time as watches don’t function well.B.It is uncertain that watches will remain popular.C.Some people claim that the watch industry is at a crossroads.D.The function of a watch has changed to stay on the market.E.New designs for a watch make it appeal to customers.F.The image of a watch satisfy many different tastes._______1. In today’s world of cell phones, mini lapt ops and MP3 players, most people have at least one time-telling tool with them. Since these devices are so common, is time running out for the 500-year-old watch? According to some consumers, yes. New Jersey teenager Charlie Wollman says a watch is “an ext ra piece of equipment with no necessary function.”Many young adults agree and they say they use their cell phones to tell time. Louis Galie, a senior vice president at Timex, said that fewer young people wear watches today than five years ago._______2. However, watchmakers optimistically say that watches regain popularity when consumers reach their 20s and 30s. By then, they are willing to spend money on a quality timepiece that doesn’t just keep good time. Fifty years ago, watchmakers laid great emphas is on products’ accuracy. But in recent years, the watch industry has transformed itself into an accessory business. And for many today, the image a watch communicates has become more important than the time it tells._______3. “Complications”—features that go beyond simple timekeeping—are an important part of a watch’s image. Today’s watches offer a host of features that suit almost any personality. These features include altitude trackers, compasses, lunar calendars, USB drives, and even devices that measure the effectiveness of golf swings._______4. Creativity is also a key element in today’s watches. Forexample, Japanese watchmaker Tokyoflash makes watches that don’t even look like watches. The company’s popular Shinshoku model uses different color lights to tell the time. It looks more like a Futuristic bracelet than a watch. Another Japanese watchmaker, Eleeno, makes a “handless” watch. Using a ring of circles to keep time, this watch makes an excellent conversation piece._______5. Whether a watch communicates fashion sense, creative flair or a love of sports, consumers want their timepieces to stand out. Nowadays, everyone has the same kind of gadget(小器械) in their bags, so people want to make a statement with what’s on their wrists. Will this intere st in wrist fashion last? Only time will tell.CDFEB。
一、实验目的学会用ADS进行集总参数匹配电路设计。
二、实验步骤1、打开“ADS(Advanced Design System)”软件:点击图标。
2、点击“Close”键,关闭Getting start with ADS窗口(如图1)。
图13、在“Advanced Design System 2009(Main)”窗口中点击“File>New Project”(如图2),图2在“New project”窗口中的“C:\users\default\”后输入“matching”,点击“OK”(如图3)。
图34、默认窗口中的选项(如图4(a)),关闭窗口“Schematic Wizard:1”,进入“[matching-prj]untitled1(Schematic):1”窗口(如图4(b))。
图4(a)图4(b)5、找到“Smith Chart Matching”,并点击(如图5)。
图5点击“Palette”下的“Smith chart”图标,弹出“Place SmartComponent:1”窗口,点击“OK”按钮(如图6(a))。
在操作窗口中点击出一个smith chart,然后点击鼠标右键选择“End Command”(如图6(b))。
图6 (a)图6(b)6、点击“Tools>Smith Chart”(如图7(a)),出现“Smith Chart Utility”以及“SmartComponent Sync”窗口,点击“Smartcomponent Sync”窗口中的“OK”(如图7(b))。
图7 (a)图7(b)7、在“Smith Cahrt Utility”窗口中Zl值为300-j*55,点击Auto 2-Element Match(如图(8)。
图88、选择一种电路方式(如图9)。
图99、回到SmithChart Utility窗口,查看结果(如图10)。
图10 (a)图10(b)10、回到“[matching-prj]untitled1(Schematic):1”窗口,在左侧找到“Simulation-SPAram”并点击(如图11)。
1. 开头句It is a fact that…It can be seen that…It is well known that…There is no doubt that…It is generally believed that…Now it is commonly accepted that…People used to hold a belief that…Nowadays more and more people are concerned with the problem that…Different people have different opinions on…When it comes to the issue of2. 提出个人观点As for me,…For my part,…As far as I’m concerned,I am in favor of …I am on the side of …In my opinion,…I agree to …The reasons can be listed as follows. Quite a number of reasons lead to this problem.In the first place, / In the second place, …Firstly, /Secondly, …First of all, / The second reason is …For one thing, / For another thing,…The first and the foremost important is…/ The last but not the least is …4.罗列正反面的论据On one hand, / On the other hand, …On the contrary, / In contrast5. 总结In all, In a word, In short, To conclude To sum up,To sum up in one word, It can be concluded that, A conclusion can be reached that …6.提出解决办法Here are some suggestions that we should…My suggestion is that…It is suggested that…Actions should be taken to…We should take some measures to7.表示问题的重要性It is very important to…It is of great importance to…It is vital to…It is playing an important role in …Without it we cannot…8.描写图表的表达方法It has been shown that…According to the table/diagram/chart, we can see that…The table/diagram/chart has revealed that…The table/diagram/chart can give us some idea of…9.描写数据变化的表达方法From the table/diagram/chart, we can see that the rate of A is higher than B.As can be seen in the table/diagram/chart, there are more A than B.The number of A is as large as B.The number of A has increased sharply from B to C.The number of A is declining dramatically from B to C.1. A 根据题干中的信息词recover from computer disasters定位到本文的第一段。
高考英语二轮复习专题训练:信息匹配(41)阅读下列应用文及相关信息,并按照要求匹配信息。
下面文章中有5处(第1~5题)需要添加小标题。
请从以下选项(A、B、C、D、E 和F)中选出符合各段意思的小标题,选项中有一项是多余选项。
1. ____________________________Every night, for about 90 minutes, we drift into a strange, shadowy, magical world of our own creation. Poets, writers, artists and even scientists have found inspiration in th eir “dreamland”. Dreams are a message from the sub-conscious, a way of tapping your inner self. Keep a note pad and pen by your bedside, and as soon as you wake, note down whatever snatches of dreams you can recall. Dreams can solve your problems, give you advice, reveal your true feelings, and be a source of inspiration.2. ____________________________What are you aware of right now? Look at a familiar object in the room as if seeing it for the first time---explore it with your eyes. Next, listen intently to any sounds you can hear. What can you smell and taste at this moment? Touch whatever is within reach, run your hand over and around it---how does it feel? During the next few weeks activate all your natural power. Visit an art gallery, walk in a pine forest, luxuriate in a second bubble bath, go to a concert, swim, have a massage. Try to experience it all as if it were totally new to you.3. ____________________________If you’re right-handed, develop the skills of your left hand or vice versa---allow it to draw something, switch TV channels or drink a cup of tea. Try this exercise: write a list of ten adjectives which characterize your personality using the hand you usually write with. A few days later, repeat the exercise writing with the other hand. Then compare the two lists. You might be surprised at the secrets of your inner self! For example, on the first list you might have written that you’re “witty”, but the second list might say “suspicious”. Then try a similar exercise, making two lists of “What I would most like to do”.4. ____________________________Have you ever longed to paint portraits or watercolors, write a novel, draw cartoons, compose a song, design your own clothes, set up a business or landscape your garden? If so, why not start now? Yes, you might discover that your fast efforts are laughable---but try, try again. With a few notable exceptions such as Mozart, most people haven’t developed their ability through sheer hard work. Don’t kid yourself that you haven’t any spare time. It’s a question of making time, of seeing your gifts as important enough to devote a few hours to each week. Who knows---you might be thenext Laura Ashley or Agatha Christie?5. ____________________________Forget about being told off for daydreaming at school. Daydreaming is good for you! Whether it’s a purely fantasy, or a dream about how life might be in the future, only the right-brain has visions of this kind. Creative visualization, vividly imagining whatever you desire as if it has already happened---and really believing in it, is said to be a powerful way of getting what you want. Many top sports people imagine themselves playing and winning---and it seems to work.EFADB。
高考英语二轮复习专题训练:信息匹配(4)阅读下列应用文及相关信息,并按照要求匹配信息。
下面文章中有5处(第1~5题)需要添加小标题。
请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题,选项中有一项是多余选项。
1. __________The Marine Science Center offers nearly four hours of an educational adventure. Observing restoring Sea Turtles, lab experiments, taking our Exhibit Gallery challenge, and learning from educational beach activities are a unique and fun way to educate all ages about the fragile environment in Florida.2. __________We require a 1 to 10 ratio of guardians to students. All guardians within that ratio are free. The fee is $3 per student and $6 per any extra adults. The fee includes a three and a half hour program with interactive activities for the students. Payment should be made upon the arrival to the Marine Science Center. Please make checks payable to: County of Volusia Marine Science Center.3. __________This program can accommodate groups up to forty students. The students must be divided into groups of ten before arriving at the center. The students will be rotated(轮换) throughout all of the activities provided.4. __________The Marine Science Center is located at 100 Lighthouse Drive in Ponce Inlet. If arriving by bus, please stop the bus on the north (right) side of Lighthouse Drive directly across from the Marine Science Center entrance sign. Students will be accompanied up the main sidewalk to the front entrance of the Marine Science Center. If arriving by separate cars, please park in the main parking lot to the right on Lighthouse Drive. Take the boardwalk to the Marine Science Center. 5. __________The bus must be available to take students to and from the Marine Science Center and Lighthouse Point Park during the field trip for beach activities. Upon arrival the driver will get specific instructions on your program schedule.DAECF。
Text B Generation Me: The Millennial Generation’s Obsession with Being UniqueA) Flashback to Sunday, May 12, 2013. It’s Mother’s Day. You wake up and go about your morning routine: coffee, breakfast, Facebook, in that order. Half-conscious, you are still able to punch out your username and password and begin mechanically scrolling through your news feed. Everything’s pretty standard. A vacation photo here. A link to the New York Times there.B) But wait. What’s this? Jessica just posted a Pic-Stitched photo centered around the words “World’s Best Mom.” And look, Kyle was up an hour ago to write an essay about how he “loves his mom so much because she’s such an inspiration.” You scroll down some more. Maria has changed her profile picture to her hugging her mother with the caption, “She’s always been there for me.” Directly below, George and his mom are laughing hysterically in a photo of them giving each other bunny ears. You anxiously take one last sip of coffee for good measure. With hunched back and furrowed brow, you set off crafting your own photo-status combo professing your love for your mother. Not because she’ll appreciate the social media attention. Nah, your mom might not even have Facebook, so she probably won’t see it. And not because you’re determined to convince your friends once and for all, beyond all words, that your mom is indeed the best mom in the world, no ifs ands or buts about it.C) Who is this post for then? Why are we drafting compliments to our mother for people who probably don’t care? To answer these questions, we need to examine the evidence that we’re living in an age of narcissism.D) It’s not difficult to observe the manifestations of our generation’s (nicknamed Generation Me) obsession with individualism, which, if left unchecked, can lead to some very evident demonstrations of self-absorption. We all take turns being the victims and offenders of shameless self-promotion of all things common in our lives via the Internet, from selfies of us on the toilet to status updates about feeling “slanty face” because our feet hurt. Sure, you could argue that these are inevitable side effects of growing up in an era when tech development grows at the speed of light and that previous generations would have used this technology in the same manner, but the phenomenon of fixating on individualism runs deeper than that.E) Members of the Millennial Generation, made up of people born between the early 1980s and the early 2000s (us), devote a giant amount of time and energy to maintaining an attitude of being unique. The clothes we buy, the music we listen to, the events we attend and even the food we eat — a huge portion of us make these consumption decisions, whether consciously or not, to stand out. Many of us lack the community-based relationships and interactions that were invaluable to members of past generations, whose personal identities were linked at least in part with family, religious groups or neighbors.F) It’s a classic dilemma of the chicken or the egg. Has the permeating theme of our generation, the yearning to be original, alienated us from feeling part of greater community? Or has alienation from a greater community herded us into this position? Regardless, we think there’s a correlation that’s worthy of discussion.G) Following our generation’s individualistic modes of thinking, we Millennials strive toward common goal of self-actualization. We study, work, volunteer, diet, exercise, socialize, dress and shop to be the “best possible versions of ourselves” we can be. More often than not, our romanticized fancy of who we can become are equated with how much money or fame we can obtain. This would be fine if it didn’t have to come with the expense of neglecting to improve something greater thanus — namely, the societies we live in.H) In fact an online Journal of Personality and Social Psychology, reports that Millennials (born 1982 to 2000) are more modestly and politically disengaged, more concerned with materialistic values and less interested in helping the larger community than were Generation X (born 1962 to 1981) and the Baby Boomers (born 1946 to about 1961) when they were our age.I) These ideas were reaffirmed in a study conducted by UCLA’s Higher Education Research Institute in partnership with the University of Michigan. The study surveyed more than 9 million high school seniors or rising college freshmen from 1966 to present, and the findings were enlightening. The proportion of students who said being wealthy was very important to them increased with each successive generation, from 45 percent for Baby Boomers to 70 percent for Generation X to 75 percent for Millennials.J) An opposite trend was true for students who felt being politically fluent was worthwhile. The percentage who said it was important to keep up to date with political affairs fell from 50 percent for Boomers to 39 percent for Gen X and 35 percent for Millennials. Of course, we recognize that the Millennials’ focus on individualism has helped reduce instances of prejudice based on race, gender and sexual orientation.K) However, for a generation that prides itself on being more socially conscious, we have made little improvement in realms like protecting the environment, volunteerism and general concern for helping the larger community.S1. Q: A survey among high school students found that an increasing number of students attached importance to wealth.S2. Q: Millennials spend quite a lot of time and energy trying to prove that they are different individuals.S3. Q: When you see other people show their love for mother by posting photos or essays on Facebook, you do it as well.S4. Q: People care too much about themselves, which can be seen easily.S5. Q: There is a correlation between longing for being unique and separation from a greater community.S6. Q: We say how we love our mother to people who don’t care probably because we love ourselves so much.S7. Q: Compared with the past generations, Millennials think more of materials, but less of contribution to the larger community.S8. Q: The concern about individualism goes deeper from generation to generation.S9. Q: Unlike the past generations, many of Millennial Generation don’t have interactions with community.S10. Q: Millennials make great efforts to become the best possible versions of themselves.KEYSS1-S5: I E B D FS6-S10: C H D E G。
英语匹配阅读试题及答案一、阅读下列短文,根据短文内容将下列人物与相应的描述进行匹配。
短文:In the small town of Greenfield, there are several notable individuals who have made significant contributions to the community.1. Alice Brown is a dedicated teacher who has been working at the local school for over 20 years. She is known for her innovative teaching methods and her ability to inspirestudents to love learning.2. Bob Smith is a passionate environmentalist who has led several community clean-up projects. He has also been instrumental in establishing a recycling program in the town.3. Carol White is a talented artist whose paintings have been displayed in many local galleries. She has won numerousawards for her work and is a mentor to young artists in the area.4. David Johnson is a respected doctor who has served thetown for more than a decade. He is well-loved for his compassionate care and commitment to improving healthcare in the community.5. Emily Davis is an entrepreneur who recently opened abookstore in the town center. Her store has become a popular spot for book lovers and has revitalized the local economy.根据短文内容,匹配以下人物与描述:A. 一位热心环保的社区领袖B. 一位在本地学校工作超过20年的教师C. 一位赢得多个奖项的画家D. 一位为社区提供医疗服务超过十年的医生E. 一位在市中心开设书店的企业家答案:A - Bob SmithB - Alice BrownC - Carol WhiteD - David JohnsonE - Emily Davis二、阅读下列对话,根据对话内容将下列问题与相应的答案进行匹配。
完胜高考2014届高三一轮复习精品训练:信息匹配(5)(广东版)(2013六校联考)第二节.信息匹配(共5小题,每小题2分,满分10分)首先请阅读下列课程介绍:A .Office Systems TechnologyCourses: Keyboarding, Introduction to Information Systems, Records & Data Base Management, Business English,Document Formatting &Word Processing, Medical TerminologyTotal Credit Hours: 18Certificates: Data Entry Receptionist, Medical Admissions ClerkContact Information: Wilma Clapp一Project Coordinator Bldg A, Room,119 Leestown Campus 164 Opportunity Way, Lexington, KY 40511 Tel: (859)246-6821B. Chemical Engineering at CambridgeOur course concentrates on the scientific principles that underpin modern chemical and biochemical engineering. The aim is to produce graduates that meet the needs of today’s process industries by providi ng technical competence, training in transferable skills, and a thorough understanding of the subject. We have strong links with industry. The course is supported by a consortium of 10 industrial companies. These links also mean that there are opportunities for vacation placements with some of the world’s top companies.Contact details: admissions@ or www. ceb. cam. ac. ukC. English Learning at CambridgeUCAS code: Q300 BA/EDuration: 3 yearsColleges: Available at all collegesRelated courses: Anglo-Saxon, Norse, and CelticClasses: History, Linguistics, Modern and Medieval Languages, Theology and Religious StudiesContact details: english-faculty@culty@ or www english. cam. ac. ukD. The SIT TESOI, Certificate CourseTeaches you the fundamentals of teaching English to speakers of other languages Gives you hands-on, trainer-observed teaching practice and includes workshop sessions and supported lesson planning by experienced trainersProvides you with modern teaching methods that help you to connect effectively with learners’ individual needs and motivations.Helps you develop confidence in your ability to teach English as a foreign languageMailing Address: PO,Box 676, 1 Kipling Road, Brattleboro, VT 05302 USAE. Skills for Life (English and Maths)Skills for Life courses give you the English and maths skills you need to manage your life at home, at work and in all aspects of your life.Skills for Life courses can also be a stepping stone to other courses, such as Skills for Learning. All of these courses are at Entry 3/Level I.These courses are FREE of charge including all accommodation, meals, tuition and learning resources.If you have any questions then please contact Yvonne Godwin at Fircroft College on 0121 472 0116.F. Human, Social, and Political SciencesUCAS code: L000 BA/HSPSDuration: 3 yearsColleges: Available at all colleges except PeterhouseRelated courses: Asian and Middle Eastern StudiesClasses: Geography, History, Psychological and Behavioural Sciences, Theology and Religious StudiesContact details: enquiries@ or www /undergraduate 以下是相关人物信息,请将相关的人物信息与他们需要的课程匹配起来。
[作业]设负载阻抗为Z
l=100+j50Ω接入特性阻抗为Z0
=50Ω的传输线
上。f=1000MHz
1)用单支节调配法实现负载与传输线匹配,通过Smith圆图求解。
2)用LC匹配网络实现负载与传输线匹配,通过Smith圆图求解。
解:
1)
解一:(开路支节)
①Z0=50ΩZL=100+j50Ωd=0.2λl=0.375λ②
Z0=50Ω
Z
L
=100+j40
Ω
d1=0.375λ
l
1
=0.125
λ
负载阻抗归一化021LZZZj,在阻抗圆图上找到负载对应的
A点,在驻波比圆上转动直到与圆1+jb相交,得到B点(绿色线路径
1)和B’点(红色线路径1),可读出负载的归一化导纳分别为11LYjS,
11LYjS
,由径向线在相位标尺上的角度可知,A点到B点旋转的
角度为θ=144o,A点到B’点旋转的角度为θ1=270o,因此支节到负载的
电长度分别为θ/2=72o和θ1/2=135o,即支节的接入位置分别为d=0.2λ ,
d1=0.375λ.
为了抵消B点和B’点中的电纳,截短线的归一化电纳为1jS。由
开路点D点,沿ρ=∞圆顺时针转到1jS的E点(绿色线路径2)和
E’(红色线路径2)点。由相位标尺上的角度可知,D点到E点旋转的
角度为θ=270o, D点到E’点旋转的角度为θ1=90o,所以支节的长度为分
别为θ/2=135o和θ1/2=45o,其对应的电长度分别为0.375λ、0.125λ,
因此支节线长度:
E点接入l=0.375λ。
E’点接入l1=0.125λ。
解二:(短路支节)
①
Z0=50Ω
Z
L
=100+j50
Ω
d=0.2λ
l=0.125
λ
②
Z0=50Ω
Z
L
=100+j50
Ω
d1=0.375λ
l
1
=0.375
λ
负载阻抗归一化021LZZZj,在阻抗圆图上找到负载对应的
A点,在驻波比圆上转动直到与圆1+jb相交,得到B点(绿色线路径
1)和B’点(红色线路径1),可读出负载的归一化导纳分别为11LYjS,
11LYjS
,由径向线在相位标尺上的角度可知,A点到B点旋转的
角度为θ=144o,A点到B’点旋转的角度为θ1=270o,因此支节到负载的
电长度分别为θ/2=72o和θ1/2=135o,即支节的接入位置分别为d=0.2λ ,
d1=0.375λ.
为了抵消B点和B’点中的电纳,截短线的归一化电纳为1jS。由
短路点F点,沿ρ=∞圆顺时针转到1jS的E点(绿色线路径2)和
E’(红色线路径2)点。由相位标尺上的角度可知,F点到E点旋转的
角度为θ=90o, F点到E’点旋转的角度为θ1=270o,所以支节的长度为分
别为θ/2=45o和θ1/2=135o,其对应的电长度分别为0.125λ、0.375λ,
因此支节线长度:
E点接入l=0.125λ。
E’点接入l1=0.375λ。
2)
解一:
Z0=50Ω
Z
L
=100+j50
Ω
负载导纳归一化00.40.2LYZZjS,在导纳圆图上找到负载对应
的A点,从负载朝源端看,并联一个电容,A点从导纳圆上沿路径1
旋转直到与1+jx的阻抗圆相交,得到B点,可读出B点负载的归一
化导纳为0.4+j0.49S,,则ΔB=j0.69S,由 0BcZ,得C=2.2pF;然
后串联一个电感,改变电抗,B点在阻抗圆上沿路径2旋转直到1+j0Ω,
B点的归一化阻抗为1-j1.224Ω,所以电抗的该变量为ΔX=-j1.224Ω,
由0LXZ,得L=9.74nH
B
A
0.4-j0.2S
0.4+j0.49S/
1-j1.224Ω
1
2
解二:
Z0=50Ω
Z
L
=100+j50
Ω
解:负载导纳归一化00.40.2LYZZjS,在导纳圆图上找到负载
对应的A点,从负载朝源端看,并联一个电感,A点从导纳圆上沿路
径1旋转直到与1+jx的阻抗圆相交,得到B点,可读出B点负载的
归一化导纳为0.4-j0.49S,,则ΔB=-j0.29S,由 0ZBL,得L=27.5nH;
然后串联一个电容,改变电抗,B点在阻抗圆上沿路径2旋转直到
1+j0Ω,B点的归一化阻抗为1+j1.224,所以电抗的该变量为ΔX=j1.224S,
由01XCZ,得C=2.6pF
0.4-j0.2S
0.4-j0.49S/
1+j1.224Ω
A
B
1
2