天线与电波传播7

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1、天线与电波传播第7次课By樊振宏2010.4.14电视发射天线1   1频道49.752   2频道57.753   3频道65.754   4频道77.255   5频道85.2513增补1频道112.2514增补2频道120.2515增补3频道128.2516增补4频道136.2517增补5频道144.2518增补6频道152.2519增补7频道160.256   6频道168.257   7频道176.258   8频道184.259   9频道192.251010频道20

2、0.251111频道208.251212频道216.2520增补8频道224.2521增补9频道232.2522增补10频道240.2523增补11频道248.2524增补12频道256.2525增补13频道264.2526增补14频道272.2527增补15频道280.2528增补16频道288.2529增补17频道296.2530增补18频道304.2531增补19频道312.2532增补20频道320.2533增补21频道328.2534增补22频道336.2535增补

3、23频道344.2536增补24频道352.2537增补25频道360.2538增补26频道368.2539增补27频道376.2540增补28频道384.2541增补29频道392.2542增补30频道400.2543增补31频道408.2544增补32频道416.2545增补33频道424.2546增补34频道432.2547增补35频道440.2548增补36频道448.2549增补37频道456.2550  13频道471.2551  14频道479.255

4、2  15频道487.2553  16频道495.2554  17频道503.2555  18频道511.2556  19频道519.2557  20频道527.2558  21频道535.2559  22频道543.2560  23频道551.2561  24频道559.256224+1频道567.256324+2频道575.256424+3频道583.256524+4频道591.256624+5频道599.2567  25频道607.2568  26频道615.2569

5、  27频道623.2570  28频道631.2571  29频道639.2572  30频道647.2573  31频道655.2574  32频道663.2575  33频道671.2576  34频道679.2577  35频道687.2578  36频道695.2579  37频道703.2580  38频道711.2581  39频道719.2582  40频道727.2583  41频道735.2584  42频道743.2585  43频道751.25

6、86  44频道759.2587  45频道767.2588  46频道775.2589  47频道783.2590  48频道791.2591  49频道799.2592  50频道807.2593  51频道815.2594  52频道823.2595  53频道831.2596  54频道839.2597  55频道847.2598  56频道855.25有线电视频道国际编号国内编号图像载频(MHz)VHF30MHz-300MHzUHF300MHz-3GHz旋转场天

7、线TurnstileAntenna旋转场天线SmallCross-Dipolewithquadraturecurrentfeeding:xryzPdLAB极化x-yplane(=90°)=0°LinearPolarisation0°<<90°Elliptical=90°Circulary-zplane(=90°)=0°LinearPolarisation0°<<90°Elliptical=90°CircularxryzPdLABx-zplane(=0°)Linear

8、lyPolarisedRadiationPattern3-DPatternofinfinitesimalTurnstileAntennaxyz2-Dx-zplaneFieldPatternofTurnstileAntennasxzxzInfinitesimalTurnstileFiniteLengthTurnstileRadiationinalldirections!应用CircularpolarisationinBroadsidedirection:SatelliteCommu