高频课设，小功率调幅发射机和小功率调频发射机有什么区别？ 如何设计一个小功率调频发射机
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\u3000\u3000http://www.zlcdz.com/uploadpic/200683093413511.gif
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\u3000\u3000\u5143\u4ef6\u6e05\u5355
\u3000\u3000\u7535\u963b:
\u3000\u3000R1+2 10k \u53ef\u8c03
\u3000\u3000R3 820k
\u3000\u3000R4 4.7k
\u3000\u3000R5-7 220
\u3000\u3000R8 1.5k
\u3000\u3000R9 15k
\u3000\u3000R10+11 1k
\u3000\u3000R12 33k
\u3000\u3000R13+14 56
\u3000\u3000R15+16 68k
\u3000\u3000R17 47
\u3000\u3000R18 270
\u3000\u3000R19 10
\u3000\u3000R20 22
\u3000\u3000R21 1.5k
\u3000\u3000R22 270
\u3000\u3000\u7535\u5bb9: \u9664\u7279\u6b8a\u6307\u5b9a\u5916\uff0c\u7528\u74f7\u4ecb\u6216\u4e91\u6bcd\u7535\u5bb9\u3002
\u3000\u3000C1,2,7,
\u3000\u300016,17,19,
\u3000\u300024,29\u53ca31 1n
\u3000\u3000C3-5\u53ca8 10u 16V \u7535\u89e3
\u3000\u3000C6, 18\u53ca30 220u 16V \u7535\u89e3
\u3000\u3000C9, 10\u53ca20 10n
\u3000\u3000C11 22p*
\u3000\u3000C12 47p*
\u3000\u3000C13 22p \u5fae\u8c03
\u3000\u3000C14\u53ca15 15p*
\u3000\u3000C21,25\u53ca26 65p \u5fae\u8c03
\u3000\u3000C22 100p
\u3000\u3000C23 15p
\u3000\u3000C24 33p
\u3000\u3000C27 1.8p
\u3000\u3000C28 5.6p
\u3000\u3000C32\u53ca34 47p
\u3000\u3000C33 22p
\u3000\u3000C35\u53ca38 1n
\u3000\u3000C36 220n
\u3000\u3000C37 100p
\u3000\u3000*C11, 12, 14 \u548c 15 \u51b3\u5b9a\u632f\u8361\u9891\u7387\uff0c\u6700\u597d\u7528\u9ad8\u8d28\u91cf\u4e91\u6bcd\u7535\u5bb9\u3002
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\u3000\u3000http://www.zlcdz.com/uploadpic/20068309430580.gif
\u3000\u3000\u56fe2A: \u7ebf\u5708\u7684\u6b63\u786e\u7ed5\u6cd5
\u3000\u3000http://www.zlcdz.com/uploadpic/200683094351166.gif
\u3000\u3000\u56fe2B: L4\uff0cMRF237\u7684\u7ba1\u811a
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\u3000\u3000\u5185\u76f4\u5f845mm\uff0c\u957f5mm
\u3000\u3000L2 3\u531d\uff0c\u5185\u76f4\u5f847mm\uff0c\u957f7mm
\u3000\u3000L3 3\u531d\uff0c\u5185\u76f4\u5f846mm\uff0c\u957f8mm
\u3000\u3000L4 \u57282.2k\u78b3\u68d2\u7535\u963b\uff08\u76f4\u5f84\u7ea6
\u3000\u30002mm\uff09\u4e0a\u997614\u531d\u76f4\u5f840.2mm
\u3000\u3000\u7684\u6f06\u5305\u7ebf\uff0c\u5c06\u6f06\u5305\u7ebf\u7684\u672b
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\u3000\u3000\u73e0\uff0c\u5982\u56fe2B\u3002
\u3000\u3000L5 5\u531d\uff0c\u5185\u76f4\u5f846mm\uff0c\u957f11mm
\u3000\u3000L6 4\u531d\uff0c\u5185\u76f4\u5f846mm\uff0c\u957f9mm
\u3000\u3000\u5c04\u9891\u627c\u6d41\u5668\uff08RF choke):
\u3000\u3000\u627c\u6d41\u5668\uff08H1-4)\u53ef\u7528\u76f4\u5f840.5mm\u7684\u6f06\u5305\u7ebf\u5728\u76f4\u5f844mm\u3001\u957f5mm\u7684\u78c1\u73e0\u4e0a\u9976\u5236\u3002\u6ce8\u610f\uff0c\u6f06\u5305\u7ebf\u5e94\u4ece\u78c1\u73e0\u7684\u5b54\u4e2d\u7a7f\u8fc7\uff0c\u78c1\u73e0\u5e94\u8be5\u7528\u5de5\u4f5c\u9891\u7387\u5728100MHz\u6750\u6599\uff08\u901a\u5e38\u662f43\u53f7\uff09\u3002\u5982\u679c\u627e\u4e0d\u5230\u78c1\u73e0\uff0c\u4e5f\u53ef\u7528\u65b9\u6cd5\u5236\u4f5c\uff1a\u572833k\u78b3\u68d2\u7535\u963b\u5668\u4e0a\u9976\u957f0.5m\u76f4\u5f840.2mm\u7684\u6f06\u5305\u7ebf\uff0c\u5c06\u6f06\u5305\u7ebf\u7684\u672b\u7aef\u710a\u7535\u963b\u7684\u63a5\u5934\u4e0a\u3002
\u3000\u3000H1 \u78c1\u73e0\u4e0a\u99765\u531d
\u3000\u3000H2 \u78c1\u73e0\u4e0a\u99761\u531d
\u3000\u3000H3 \u78c1\u73e0\u4e0a\u99762\u531d
\u3000\u3000H4 \u78c1\u73e0\u4e0a\u99763\u531d
\u3000\u3000\u4e8c\u6781\u7ba1: D1\u6700\u597d\u7528\u53d8\u5bb9\u7ba1\u5bf9\uff0c\u5373\u4e24\u4e2a\u5bf9\u79f0\u7684\u53d8\u5bb9\u7ba1\u80cc\u9760\u80cc\u8fde\u5728\u4e00\u8d77\uff0c\u4e2d\u95f4\u662f\u8d1f\u6781\uff1b\u4f46\u8fd9\u5e76\u4e0d\u5341\u5206\u91cd\u8981\uff0c\u4e24\u4e2a\u4e00\u822c\u7684\u53d8\u5bb9\u7ba1\u4e5f\u53ef\u4ee5\u3002
\u3000\u3000D1 KV1310
\u3000\u3000D2+3 1N4148
\u3000\u3000D4 \u4e00\u822c\u7684\u653e\u5149\u4e8c\u6781\u7ba1
\u3000\u3000D5 1N4001
\u3000\u3000\u4e09\u7ea7\u7ba1:
\u3000\u3000T1+5 BC548\uff0c\u4e00\u822c\u5c0f\u4fe1\u53f7\u4e09\u6781\u7ba1
\u3000\u3000T2+3 BF494\uff0c\u9ad8\u9891\u5c0f\u4fe1\u53f7\u4e09\u6781\u7ba1
\u3000\u3000T4 \u5c04\u9891\u529f\u7387\u7ba1
\u3000\u30002W,12V,10dB@175MHz
\u3000\u30002N4427\uff0cC2538\uff0cC1970
\u3000\u30003DA190\uff0c3DA194 \u7b49
\u3000\u3000T6 \u5c04\u9891\u529f\u7387\u7ba1
\u3000\u30004W 18V >=10dB@150MHz
\u3000\u3000MRF237\uff0c2N3926\uff0cC1971,
\u3000\u3000C1947\uff0cMRF630\uff0cBLU99,
\u3000\u30003DA21\uff0c3DA106\uff0c3DA56
\u3000\u30003DA192\uff0c3DA22\uff0c\u7b49
\u3000\u3000\u6ce8\u610f\uff1a\u5176\u5b83\u4fe1\u53f7\u7684\u529f\u7387\u7ba1\u7684
\u3000\u3000\u7ba1\u811a\u4f4d\u7f6e\u53ef\u80fd\u4e0e\u56fe8\u4e0d\u540c\u3002
\u3000\u3000\u56fe3: \u4e09\u7ea7\u7ba1\u7ba1\u811a\u7684\u4fef\u89c6\u56fe
\u3000\u3000\u7a33\u538b\u5668: I1\u662f\u4e00\u4e2a5\u4f0f\u7a33\u538b\u5668\uff0c\u7ed9D1\u63d0\u4f9b\u6052\u5b9a\u7535\u538b\uff0c\u4ee5\u4fdd\u6301\u53d1\u5c04\u5668\u7684\u9891\u7387\u7a33\u5b9a\u3002
\u3000\u3000I1: 78L05 (\u62167805)
\u3000\u3000\u5176\u5b83:
\u3000\u3000\u7535\u8def\u76d2
\u3000\u3000BNC \u5c04\u9891\u8f93\u51fa\u63d2\u53e3
\u3000\u30002 x 3.5mm \u97f3\u9891\u8f93\u5165\u63d2\u53e3
\u3000\u3000\u7535\u6e90\u63d2\u53e3
\u3000\u30009-16V\u7535\u6e90
\u3000\u3000\u5929\u7ebf
\u3000\u3000\u8bdd\u7b52
\u3000\u3000CD\u673a\u6216\u5f55\u97f3\u673a
\u3000\u3000\u88c5\u914d
\u3000\u3000Veronica \u53d1\u5c04\u673a\u7528\u7684\u5370\u5237\u7535\u8def\u677f\uff08PCB\uff09\u5982\u56fe4\u3002\u5c04\u9891\u7535\u8def\u5bf9\u7c97\u52a3\u7684\u7535\u8def\u677f\uff08\u5305\u62ec\u5e03\u7ebf\u3001\u63a5\u5730\u3001\u90e8\u4ef6\u7684\u4f4d\u7f6e\u7b49\uff09\u662f\u76f8\u5f53\u654f\u611f\u7684\u3002\u5e94\u907f\u514d\u4f7f\u7528\u9762\u5305\u677f\uff1b\u4f7f\u7528\u4e00\u9762\u63a5\u5730\u7684\u53cc\u9762\u7535\u8def\u677f\u6700\u597d\uff0c\u4f46\u56fe4\u7684\u8bbe\u8ba1\u91c7\u7528\u63a5\u5730\u5bfc\u4f53\u586b\u5145\u4e86\u4e00\u822c\u8d70\u7ebf\u5468\u56f4\u7684\u7a7a\u5f53\uff0c\u8fd9\u6837\u7684\u8bbe\u8ba1\u5373\u4f7f\u7528\u5355\u9762\u7535\u8def\u677f\u6548\u679c\u4e5f\u5f88\u597d\u3002\u5143\u4ef6\u5e94\u8be5\u5c3d\u53ef\u80fd\u7528\u6700\u77ed\u7684\u5bfc\u7ebf\u5e73\u5c55\u5730\u5b89\u7f6e\u5728\u7535\u8def\u677f\u4e0a\u3002\u53d1\u5c04\u673a\u5e94\u8be5\u88c5\u5728\u91d1\u5c5e\u5c4f\u853d\u76d2\u5185\uff08\u5982\u94f8\u94dd\u76d2\uff09\uff0c\u800c\u91d1\u5c5e\u76d2\u8fde\u63a5\u7535\u8def\u7684\u5730\u6781\u3002\u53ef\u4f7f\u75283mm\u7c97\u7684\u87ba\u6813\u4e0e5-10mm\u957f\u7684\u652f\u6491\u67f1\uff0c\u6765\u8fbe\u5230\u91d1\u5c5e\u76d2\u4e8e\u7535\u8def\u677f\u4ef6\u7684\u826f\u597d\u8fde\u63a5\u3002
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\u3000\u3000\u8bdd\u7b52\u548c\u5149\u76d8\u8f93\u5165\u63a5\u53e3\u53ef\u75283.5mm\u7684\u8033\u673a\u63d2\u5ea7, \u7535\u6e90\u4e5f\u53ef\u4ee5\u7528\u7c7b\u4f3c\u7684\u63d2\u5ea7\u3002\u5bf9\u4e8e\u5929\u7ebf\u8f93\u51fa\uff0c\u6211\u4eec\u63a8\u8350BNC\u63d2\u5ea7\u6216\u7535\u89c6\u673a\u7528\u7684\u90a3\u79cdF\u578b\u63d2\u5ea7\uff08\u539f\u4ea7\u54c1\u7528N\u578b\u63d2\u5ea7\uff09\u3002\u63d2\u5ea7\u7684\u5730\u6781\u5e94\u8be5\u4e0e\u91d1\u5c5e\u5c4f\u853d\u76d2\u8fde\u63a5\u597d, \u5e76\u4e14\u5185\u90e8\u5bfc\u7ebf\u5e94\u8be5\u5c3d\u53ef\u80fd\u77ed\u3002\u53ef\u628aD5\u5d4c\u5728\u76d2\u76d6\u4e0a\uff0c\u8fd9\u6837\u4f60\u80fd\u7ecf\u5e38\u68c0\u67e5\u8fd9\u4e2a\u53d1\u5c04\u673a\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\u3002
\u3000\u3000http://www.zlcdz.com/uploadpic/200683094932642.gif
\u3000\u3000\u56fe5: \u5143\u4ef6\u88c5\u914d\u4f4d\u7f6e\u56fe
\u3000\u3000\u7535\u6e90
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\u3000\u3000\u5929\u7ebf
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\u3000\u3000\u8c03\u8bd5
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调频 频指频率
调频的特点是频宽窄，距离长。频宽窄的意思是对阻碍物的穿透能力弱，但是传输距离长。这种技术一般使用在手机、寻呼机等需要长距离（5公里以上）传输的产品使用。
调幅的特点是频宽宽，距离短。频宽宽的意思是对阻碍物的穿透能力强，但是传输距离较短，这种技术一般应用在楼宇内的无线报警、无线安防等领域。因为在一个楼宇里面最重要的不是距离，而是穿透能力。
1． 调频比调幅抗干扰能力强
外来的各种干扰、加工业和天电干扰等，对已调波的影响主要表现为产生寄生调幅，形成噪声。调频制可以用限幅的方法，消除干扰所引起的寄生调幅。而调幅制中已调幅信号的幅度是变化的，因而不能采用限幅，也就很难消除外来的干扰。
另外，信号的信噪比愈大，抗干扰能力就愈强。而解调后获得的信号的信噪比与调制系数有关，调制系数越大，信噪比越大。由于调频系数远大于调幅系数，因此，调频波信噪比高，调频广播中干扰噪声小。
2．调频波比调幅波频带宽
频带宽度与调制系数有关，即：调制系数大，频带宽。调频中常取调频系数大于1，而调幅系数是小于1的，所以，调频波的频带宽度比调幅波的频带宽度大得多。
3．调频制功率利用率大于调幅制
发射总功率中，边频功率为传送调制信号的有效功率，而边频功率与调制系数有关，调制系数大，边频功率大。由于调频系数mf大于调幅系数ma，所以，调频制的功率利用率比调幅制高。
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