38. RF">RF绔彛鍖归厤缁撴灉濂藉潖鐩存帴褰卞搷RF">RF閾捐矾鐨勪俊鍙疯川閲忋€傚浣曟渶蹇渶濂藉湴璋冭瘯杩欎簺鍖归厤鐢佃矾锛?br /> 绛旓細绗竴姝ワ細鍙互鍩轰簬鐢佃矾鏉胯璁′娇鐢ㄧ綉缁滃垎鏋愪华娴嬮噺瀹為檯鐨凷鍙傛暟,骞跺皢鍏惰緭鍏ュ埌RF">RF浠跨湡SW涓?浠ヨ幏寰楀垵濮嬬殑鍖归厤缃戠粶銆?br /> 绗簩姝ワ細鍙互鍩轰簬鍖归厤缃戠粶鐨勪豢鐪熺粨鏋?鍦ㄦ澘涓婂仛涓€浜涜繘涓€姝ョ殑浼樺寲宸ヤ綔銆?br /> 闄勶細鐩稿叧鑻辨枃鍥炵瓟锛?br /> Step 1: You can measure the actual S parameters using network analyser based on your board design and input it to the RF">RF simulation SW to get the initial matching network.
step 2: Based on the simulation result of matching network you can do some further optimization work on your board.

39. 鎵嬫満">鎵嬫満鐢佃矾鐢荤數璺澘鏃?濡備綍瑙ｉ櫎DC-DC CONVERTER瀵筊F">RF鐢佃矾鐨勫奖鍝嶏紵
绛旓細鍙互澧炲姞鐢靛鏉ユ护闄ゅ鐩存祦绾胯矾鐨勫奖鍝?涔熷彲浠ヤ娇鐢ㄩ拡瀵筊F">RF绾胯矾鐨勪笓鐢↙DO銆?br />
40. RF">RF閫氳鐨勬渶杩滆兘杈惧埌1鍏噷鎴栨洿杩滃悧锛?br /> 绛旓細杩欑敱RF">RF棰戠巼銆佸彂灏勫姛鐜囧拰澶╃嚎绛夊洜绱犲喅瀹氥€傚苟闈炲浐瀹氳窛绂汇€?br />
41. 鍦ㄨ璁″wireless LAN card 鐨勬椂鍊欏父浼氫娇鐢ㄥ睆钄界僵鐢ㄤ互灞忚斀鎺塕F">RF閮ㄥ垎鐨勮緪灏勩€傝繖鏍峰仛浼氬鍔犳垚鏈€傛湁浠€涔堝姙娉曞彲浠ュ皯鐢ㄧ敋鑷充笉鐢ㄥ睆钄界僵锛?br /> 绛旓細鍙皢楂樺姛鐜嘡F">RF淇″彿缃簬PCB涓棿灞?骞剁‘淇濊壇濂芥帴鍦颁互鍑忓皯鏁ｅ皠銆備絾鏄睆钄界僵浠嶆槸淇濊瘉绋冲畾鍙戝皠鎬ц兘鐨勯閫夈€?br /> You can put high power RF">RF signal in the middle layer of PCB and make sure have good grounding to reduce the radiation,but shielding can is still the preferred way to gurantee the stable radiation performance.

42. 10锝?0mV鐨勬湁鐢ㄤ俊鍙凤細鏀惧ぇ100锝?20dB鍚?鏈夌敤淇″彿杈惧埌宄板嘲鍊?V锝瀪4V,浣嗗櫔澹颁俊鍙蜂篃杈惧埌浜?00mV宸﹀彸,浣嗗疄闄呰姹傚櫔澹颁俊鍙峰湪20mV浠ヤ笅,濡備綍瑙ｅ喅锛燂紙鍓嶇骇鏀惧ぇ闂涓嶆槑鏄?鐭涚浘涓嶇獊鍑?鍏抽敭鍒版渶鍚庝竴绾ф斁澶у悗,闂灏卞嚭鐜颁簡銆傦級
绛旓細棣栧厛瑕佺‘淇濇湁鐢ㄤ俊鍙锋湁闈炲父濂界殑淇″櫔姣?鐒跺悗鎵嶅皢鍏惰緭鍏?a class="innerlink" href="http://www、chinaaet、com/search/?q=鏀惧ぇ鍣? title="鏀惧ぇ鍣?>鏀惧ぇ鍣?/a>閾?鎺ョ潃璁＄畻鑾峰緱鐩爣淇″彿鎸箙鍜屽櫔澹版按骞虫墍闇€鐨勫鐩婁笌NF鐨勫ぇ灏?鏈€鍚庢牴鎹繖浜涙暟鎹€夋嫨鍚堥€傜殑鍣ㄤ欢璁捐鏀惧ぇ鍣ㄩ摼璺€?br /> First please make sure the useful signal has very good SNR before you input it to amplifiers chain,then you can calculate how much gain and NF you need to get the targeted signal amplitude and noise level, based on this you can choose the right components to design amplifiers chain.

43. 鍦ㄥ紑鍙慦LAN鐨凱CB Layou鏃跺€?鎬庢牱鍖归厤鎴栬绠楃嚎璺负50ohm.锛?br /> 绛旓細50ohm鍖归厤鐢盤CB灞傚彔鍐冲畾銆傚皢PCB鍙傛暟(灞傚帤搴︺€?浣跨敤RF">RF浠跨湡宸ュ叿璁＄畻闃绘姉銆乴ine thickness鍜宭ine width銆?br /> You can calculate the impedance using RF">RF simulation tools by setting PCB parameters like layer thickness, line thickness and line width.

44. 濡傛灉绾胯矾鍖归厤涓嶅ソ,鎬庢牱鍦ㄧ綉缁滃垎鏋愪华涓嬭绠楁墍鍖归厤鐨勫厓浠讹紙L ,C锛夛紵
绛旓細濡傛灉绾胯矾涓嶅尮閰?鍙互浣跨敤缃戠粶鍒嗘瀽浠祴閲廠鍙傛暟,骞跺€熷姪鍙插瘑鏂渾鍥句娇鐢↙C鍏冧欢鏉ヨˉ鍋胯繖绉嶄笉鍖归厤銆?br /> If there‘‘s mismatching you can use network analyser to measure the S-parameters and use LC conponents to compensate the mismatch using Smith chart.

45. 鍦ㄧ綉鎴夸腑娴嬭瘯LNA鎺ユ敹鐏垫晱搴?娴嬭瘯鐐瑰簲璇ラ€夋嫨鍝効鐐逛笂鏈€浣筹紵
绛旓細閫氬父娴嬭瘯RX鐏垫晱搴?鑰屼笉娴嬭瘯LNA鐏垫晱搴︺€?br />
46. 鍦ㄥ皠棰戠數璺瘮濡傛斁澶у櫒鐨勮璁′腑,鍏剁瀛愮殑淇″彿鍦颁笌鍋忕疆鐢佃矾鐨勭數婧愬湴鏄惁鍒嗗紑涓哄ソ,鎴栬€呰嚦灏戝湪鍚屼竴灞傚垎寮€锛?br /> 绛旓細涓€鑸笉闇€瑕佸垎寮€淇″彿鍦板拰鐢垫簮鍦般€?br /> Normally you don‘‘t need to seperate the ground of power supply with the ground of amplifier銆?br />
47. 涓嶅皯灏勯PCB甯冩澘鍦ㄧ┖鍩熷嵆鏃犲厓浠跺拰璧扮嚎鐨勫湴鏂规病鏈夊竷澶ч潰绉湴,杩欏浣曡В閲婏紵鍦ㄥ井娉㈤娈垫槸鍚﹀簲涓嶄竴鏍凤紵
绛旓細鍙互鍦―C绾胯矾涓婂姞瓒虫暟鐨勫皬鐢靛櫒銆?br /> you can add enough small capacitors on DC line.

48. 鐩墠鏈夋病鏈夌疆浜庝綆娓╃幆澧冧腑鐨勬斁澶у櫒绠″瓙澶栭攢锛?br /> 绛旓細鏀惧ぇ鍣ㄧ殑宸ヤ綔娓╁害鑼冨洿搴旇鍦?10-8鈩?鍙互鏌ョ湅鍙傛暟琛?涓婇潰鐨勮瀹氬簲璇ヤ篃鏄姝ゃ€?br /> For amplifier it should have its working temperature range like -10-85c, you can check the datasheet,it should have this specification.

49. 鎵嬫満">鎵嬫満RF">RF IC澶勭悊淇″彿鐨勫師鐞嗗浣曪紵
绛旓細褰撳皠棰?涓(RF">RF/IF)IC鎺ユ敹淇″彿鏃?绯绘帴鍙楄嚜澶╃嚎鐨勪俊鍙?绾?00Hz锝?GHz)缁忔斁澶с€佹护娉笌鍚堟垚澶勭悊鍚?灏嗗皠棰戜俊鍙烽檷棰戜负鍩哄甫,鎺ョ潃鏄熀甯︿俊鍙峰鐞?鑰孯F">RF/IF IC鍙戝皠淇″彿鏃?鍒欐槸灏?0KHz浠ヤ笅鐨勫熀甯?杩涜鍗囬澶勭悊,杞崲涓哄皠棰戦甯﹀唴鐨勪俊鍙峰啀鍙戝皠鍑哄幓銆?br />
50. 涓€鑸墜鏈?quot;>鎵嬫満灏勯/涓妯″潡鐢卞摢浜涢儴鍒嗙粍鎴愶紵
绛旓細涓€鑸墜鏈?quot;>鎵嬫満灏勯/涓妯″潡绯荤敱鏃犵嚎鎺ユ敹銆佷俊鍙峰悎鎴愪笌鏃犵嚎鍙戝皠涓変釜鍗曞厓缁勬垚,鍏朵腑鏃犵嚎鎺ユ敹鍗曞厓绯荤敱灏勯澶寸銆佹贩娉㈠櫒銆佷腑棰戞斁澶у櫒涓庤В璋冨櫒鎵€缁勬垚;淇″彿鍚堟垚閮ㄤ唤鍖呭惈鍒嗛厤鍣ㄤ笌閿佺浉鍥炶矾;鏃犵嚎鍙戝皠鍗曞厓鍒欑敱鍔熺巼鏀惧ぇ鍣ㄣ€丄GC鏀惧ぇ鍣ㄤ笌璋冨彉鍣ㄧ粍鎴愩€?br />
51. 鎵嬫満">鎵嬫満鍩哄甫澶勭悊鍣ㄧ殑缁勬垚鍜屼富瑕佸姛鑳芥槸浠€涔堬紵
绛旓細甯歌鎵嬫満">鎵嬫満鍩哄甫澶勭悊鍣ㄥ垯璐熻矗鏁版嵁澶勭悊涓庡偍瀛?涓昏缁勪欢涓篋SP銆佸井鎺у埗鍣ㄣ€佸唴瀛?濡係RAM銆丗lash)绛夊崟鍏?涓昏鍔熻兘涓哄熀甯︾紪鐮?璇戠爜銆佸０闊崇紪鐮佸強璇煶缂栫爜绛夈€?br />
52. 濡備綍鐞嗚В鎵嬫満">鎵嬫満鐨勫皠棰戙€佷腑棰戝拰鍩洪锛?br /> 绛旓細鎵嬫満">鎵嬫満鍐呴儴鍩烘湰鏋勯€犱緷涓嶅悓棰戠巼淇″彿鐨勫鐞嗗彲鍒嗘垚灏勯锛堬疾锛︼級銆佷腑棰戯紙锛╋鸡锛夊強鍩洪锛堬饥锛︼級涓夊ぇ閮ㄥ垎,灏勯璐熻矗鎺ユ敹鍙婂彂灏勯珮棰戜俊鍙?鍩洪鍒欒礋璐ｄ俊鍙峰鐞嗗強鍌ㄥ瓨绛夊姛鑳?涓鍒欐槸灏勯涓庡熀棰戠殑涓粙妗ユ,浣夸俊鍙疯兘椤哄埄鐢遍珮棰戜俊鍙疯浆鎴愬熀棰戠殑淇″彿銆?br />
53. 鎵嬫満">鎵嬫満鏈€鍚庣殑鍙戝皠棰戠巼鏄湪890锛嶏紞915Mhz,杩欐槸璋冮娉㈣繕鏄皟骞呮尝锛熸祴浣跨敤gmsk璋冨埗鐨刧sm鎵嬫満">鎵嬫満鐨勫皠棰戦儴鍒?涓轰綍鍦ㄦ祴璇曟椂浣跨敤鍥哄畾鐨?02.4Mhz鐨勫浐瀹氶鐜囷紵
绛旓細GMSK璋冨埗鎸囬珮鏂渶灏忛绉婚敭鎺?鏄暟瀛楄皟鍒?鏌愮绋嬪害涓婂彲浠ョ悊瑙ｆ垚鏄皟棰?浣嗛鐜囩殑鏀瑰彉浠ョ鏁ｇ殑锛堜笉杩炵画鐨勶級鏂瑰紡杩涜,鑰岃皟棰戠函绮规槸妯℃嫙璋冨埗,棰戠巼鐨勬敼鍙樻槸杩炵画鐨勩€?br /> 浠?90MHZ鍒?15MHZ鍏?5MHZ棰戝甫瀹藉害,淇￠亾闂撮殧涓?00KHZ锛堝嵆0.2MHZ锛?鍏辨湁125涓笂琛屼俊閬?娴嬭瘯鏃朵笉鍙兘125涓俊閬撻兘娴?閫氬父浼氶€?涓湁浠ｈ〃鎬х殑棰戠偣锛堜俊閬擄級,涓よ竟涓や釜,涓棿涓€涓?902.4MHZ鍒氬ソ鏄腑闂寸殑淇￠亾銆?br />
54. 鎵嬫満">鎵嬫満娴嬭瘯椤圭洰锛氬皠棰戣浇娉㈠姛鐜囥€佹椂闂?鍔熺巼鍖呯粶銆佺浉浣嶈宸€佹帴鏀舵姤鍛婄數骞崇殑鑻辨枃琛ㄨ揪鏄粈涔堬紵
绛旓細灏勯杞芥尝鍔熺巼锛歊F">RF Carrier Power;鏃堕棿/鍔熺巼鍖呯粶锛歍ime/Power Template;鐩镐綅璇樊锛歅hase Error;鎺ユ敹鎶ュ憡鐢靛钩锛歊SSI銆?br />
55. 鐜板湪杈冩祦琛岀殑灏勯浠跨湡杞欢鏈夊摢浜涳紵
绛旓細涓€鑸潵璇寸敓浜у皠棰戝櫒浠剁殑鍘傚晢閮芥湁杩欐牱鐨勮蒋浠躲€傚EIC鐨勪骇鍝佸氨鏈夎繖鏍风殑杞欢,鍙灏嗚璁＄數璺殑鍣ㄤ欢鍙傛暟杈撳叆,鍗冲彲銆傜洰鍓嶈緝娴佽鐨勫皠棰戜豢鐪熻蒋浠舵湁锛欻P-ADS銆丄DS銆乵icrowave office銆丄nsoft绛夈€?br />
56. 鎵嬫満">鎵嬫満涓昏鏈夊熀甯﹀拰灏勯缁勬垚,灏勯鐜板湪寰堝IC鍘傚閮藉凡缁忔湁鍗曡姱鐗囦骇鍝併€傚悓鏃跺熀甯︿篃鏈夊皢DSP鍜孉RM鏍搁泦鎴愬湪涓€鍧桰C涓€俆I鐩墠鏄惁鏈夊崟鑺墖鐨勫熀甯︼紵
绛旓細鐩墠TI鐨勬暟瀛楀熀甯﹁姱鐗囦腑宸茬粡鎶夾RM7鍜孌SP闆嗘垚鍦ㄤ竴璧蜂簡銆?br />
57. What is the requirement for phase noise at 1k offset, 10kHz offset, and 100kHz offset for GSM handset? GSM鎵嬫満">鎵嬫満鐨勭浉浣嶅櫔澹颁负1k銆?0kHz鍜?00kHz鐨勬儏鍐典笅,闇€瑕佹弧瓒充粈涔堟潯浠讹紵
绛旓細For GSM handset RX it has several architectures to implement: Superheterodyne,near zero-IF,zero-IF,different architecture may have different
LOs requirement and frequency plan,also it‘‘s related to the design of filters.
瀵逛簬GSM鎵嬫満">鎵嬫満RX,闇€瑕佸疄鐜帮細瓒呭宸帴杩戜簬闆朵腑棰?zero-IF)銆備笉鍚屾灦鏋勭殑闆朵腑棰戜笉鍚屻€侺os瑕佹眰浠ュ強棰戠巼瑙勫垝(frequency plan),杩欎笌婊ゆ尝鍣ㄧ殑璁捐鏈夊叧銆?br />
58. 鎺ュ彈鏈哄湪鎺ュ彈鐏垫晱搴﹀緢楂樼殑鎯呭喌涓嬮潤鎬侀煶璐ㄩ噺寰堝ソ,鑰屽湪涓€瀹氱Щ鍔ㄦ椂鍗翠笉濂?鍙兘鏄粈涔堝師鍥狅紵
绛旓細鍙兘鏄痜ading鐨勫奖鍝嶃€?br /> 59. 鍐冲畾涓€涓皠棰戠數璺璁℃槸鍚﹁兘澶熼噺浜х殑鍏抽敭 鍥犵礌鏈夊摢浜?
绛旓細鍦ㄥぇ閲忕敓浜ф椂瑕佹眰灏勯鎬ц兘涓€鑷淬€佸彲闈犮€佺ǔ瀹?娌℃湁绂绘暎鎬?骞朵笖婊¤冻鐢熶骇宸ヨ壓鐨勮姹傘€?br />
60. 璇烽棶鍦═I鐨勮В鍐虫柟妗堜腑, DSP杞欢鏄惁涓嶮CU杞欢鍏辩敤鍚屼竴鎿嶄綔绯荤粺 ?
绛旓細鍦═I鐨勮В鍐虫柟妗堜腑,浠ヨ嚦浜庢墍鏈夌殑瑙ｅ喅鏂规涓?DSP杞欢閮戒笉鑳藉拰MCU杞欢鍏辩敤涓€涓搷浣滅郴缁熴€傚畠浠櫧鐒堕泦鎴愬湪涓€涓姱鐗囦笂,浣嗘槸灞炰簬鐙珛 鐨勬ā鍧?鐩稿綋浜庝袱涓嫭绔嬬殑澶勭悊 鍣ㄣ€?br />
61. 濡備綍闄嶄綆spectrum_switch锛?br /> 绛旓細濡傛灉鏄棴鐜姛鐜囨帶鍒?蹇呴』娉ㄦ剰PA杈撳嚭 鍔熺巼妫€娴嬬數璺兘澶熸弧瓒矴SM鍔ㄦ€?鑼冨洿銆?br />
62. 鎵嬫満鐨勫垏鎹㈤鐜囧緢蹇?浠ュ墠鎴戜滑鎵€鐢ㄧ殑鎵嬫満涓€鑸敤涓や釜閿佺浉鐜潵閿侀,鐜板湪鍦ㄥ崟鑺墖绯荤粺涓?鍙敤涓€涓攣鐩哥幆,閲囩敤N鍒嗘暟閿侀鎶€鏈?璇烽棶涓€鑸椂闂存帶鍒跺湪澶氬皯绉掓瘮杈冨悎閫傦紵
绛旓細閿佸畾鏃堕棿鍙栧喅浜庡叿浣撳簲鐢?灏忎簬250us鍙互婊¤冻gprs class 12 鐨勮姹傘€?br />
63. 鍦ㄨ璁″垵鏈熷拰鍚庢湡鐨刾cb璋冭瘯涓簲璇ユ敞鎰忛偅浜涢棶棰橈紵
绛旓細闇€瑕佽皟鏁碽urst ramp up 鍜?ramp down鐨勫姛鐜囨帶鍒躲€?br />
64. TI鍙惁鎻愪緵MMI鐨勬簮浠ｇ爜锛?br /> 绛旓細涓€鑸儏鍐典笅,TI灏哅MI婧愪唬鐮佷笌鏌愪簺椹卞姩鍣?LCD绛?婧愪唬鐮佷竴鍚屾彁渚涚粰鐢ㄦ埛銆傚寘鎷琈MI銆佸崗璁爢鏍堝拰layer1婧愪唬鐮佸湪鍐呯殑鎵€鏈夋簮浠ｇ爜灏嗘牴鎹笟鍔?鍏崇郴鍐冲畾鏄惁鎻愪緵銆?br />
65. 鎬庢牱瑙ｅ喅楂橀LC鎸崱鐢佃矾鐨勪簩娆¤皭鎸垨鑰呭娆¤皭鎸紵
绛旓細鍙互鏀瑰杽鎸崱鍣ㄥ弽棣堢綉缁滅殑棰戠巼閫夋嫨鎬?鎴栬€呭埄鐢ㄨ緭鍏ュ尮閰嶇數璺互鍓婂急璋愭尝銆?br /> 闄勶細鐩稿叧鑻辨枃鍥炵瓟鍘熸枃锛?br /> You can improve the frequency selectivity of oscillator feedback network or take advantage of the output matching circuitry to attenuate the harmonics.

66. RF绔彛鍖归厤缁撴灉濂藉潖鐩存帴褰卞搷RF閾捐矾鐨勪俊鍙疯川閲忋€傚浣曟渶蹇渶濂藉湴璋冭瘯杩欎簺鍖归厤鐢佃矾锛?br /> 绛旓細绗竴姝ワ細鍙互鍩轰簬鐢佃矾鏉胯璁′娇鐢ㄧ綉缁滃垎鏋愪华娴嬮噺瀹為檯鐨凷鍙傛暟,骞跺皢鍏惰緭鍏ュ埌RF浠跨湡SW涓?浠ヨ幏寰楀垵濮嬬殑鍖归厤缃戠粶銆?br /> 绗簩姝ワ細鍙互鍩轰簬鍖归厤缃戠粶鐨勪豢鐪熺粨鏋?鍦ㄦ澘涓婂仛涓€浜涜繘涓€姝ョ殑浼樺寲宸ヤ綔銆?br /> 闄勶細鐩稿叧鑻辨枃鍥炵瓟锛?br /> Step 1: You can measure the actual S parameters using network analyser based on your board design and input it to the RF simulation SW to get the initial matching network.
step 2: Based on the simulation result of matching network you can do some further optimization work on your board.

67. 鎵嬫満鐢佃矾鐢荤數璺澘鏃?濡備綍瑙ｉ櫎DC-DC CONVERTER瀵筊F鐢佃矾鐨勫奖鍝嶏紵
绛旓細鍙互澧炲姞鐢靛鏉ユ护闄ゅ鐩存祦绾胯矾鐨勫奖鍝?涔熷彲浠ヤ娇鐢ㄩ拡瀵筊F绾胯矾鐨勪笓鐢↙DO銆?br />
68. RF閫氳鐨勬渶杩滆兘杈惧埌1鍏噷鎴栨洿杩滃悧锛?br /> 绛旓細杩欑敱RF棰戠巼銆佸彂灏勫姛鐜囧拰澶╃嚎绛夊洜绱犲喅瀹氥€傚苟闈炲浐瀹氳窛绂汇€?br />
69. 鍦ㄨ璁″wireless LAN card 鐨勬椂鍊欏父浼氫娇鐢ㄥ睆钄界僵鐢ㄤ互灞忚斀鎺塕F閮ㄥ垎鐨勮緪灏勩€傝繖鏍峰仛浼氬鍔犳垚鏈€傛湁浠€涔堝姙娉曞彲浠ュ皯鐢ㄧ敋鑷充笉鐢ㄥ睆钄界僵锛?br /> 绛旓細鍙皢楂樺姛鐜嘡F淇″彿缃簬PCB涓棿灞?骞剁‘淇濊壇濂芥帴鍦颁互鍑忓皯鏁ｅ皠銆備絾鏄睆钄界僵浠嶆槸淇濊瘉绋冲畾鍙戝皠鎬ц兘鐨勯閫夈€?br /> You can put high power RF signal in the middle layer of PCB and make sure have good grounding to reduce the radiation,but shielding can is still the preferred way to gurantee the stable radiation performance.

70. 10锝?0mV鐨勬湁鐢ㄤ俊鍙凤細鏀惧ぇ100锝?20dB鍚?鏈夌敤淇″彿杈惧埌宄板嘲鍊?V锝瀪4V,浣嗗櫔澹颁俊鍙蜂篃杈惧埌浜?00mV宸﹀彸,浣嗗疄闄呰姹傚櫔澹颁俊鍙峰湪20mV浠ヤ笅,濡備綍瑙ｅ喅锛燂紙鍓嶇骇鏀惧ぇ闂涓嶆槑鏄?鐭涚浘涓嶇獊鍑?鍏抽敭鍒版渶鍚庝竴绾ф斁澶у悗,闂灏卞嚭鐜颁簡銆傦級
绛旓細棣栧厛瑕佺‘淇濇湁鐢ㄤ俊鍙锋湁闈炲父濂界殑淇″櫔姣?鐒跺悗鎵嶅皢鍏惰緭鍏ユ斁澶у櫒閾?鎺ョ潃璁＄畻鑾峰緱鐩爣淇″彿鎸箙鍜屽櫔澹版按骞虫墍闇€鐨勫鐩婁笌NF鐨勫ぇ灏?鏈€鍚庢牴鎹繖浜涙暟鎹?閫夋嫨鍚堥€傜殑鍣ㄤ欢璁捐鏀惧ぇ鍣ㄩ摼璺€?br /> First please make sure the useful signal has very good SNR before you input it to amplifiers chain,then you can calculate how much gain and NF you need to get the targeted signal amplitude and noise level, based on this you can choose the right components to design amplifiers chain.

71. 鍦ㄥ紑鍙慦LAN鐨凱CB Layou鏃跺€?鎬庢牱鍖归厤鎴栬绠楃嚎璺负50ohm.锛?br /> 绛旓細50ohm鍖归厤鐢盤CB灞傚彔鍐冲畾銆傚皢PCB鍙傛暟(灞傚帤搴︺€?浣跨敤RF浠跨湡宸ュ叿璁＄畻闃绘姉銆乴ine thickness鍜宭ine width銆?br /> You can calculate the impedance using RF simulation tools by setting PCB parameters like layer thickness, line thickness and line width.

72. 濡傛灉绾胯矾鍖归厤涓嶅ソ,鎬庢牱鍦ㄧ綉缁滃垎鏋愪华涓嬭绠楁墍鍖归厤鐨勫厓浠讹紙L ,C锛夛紵
绛旓細濡傛灉绾胯矾涓嶅尮閰?鍙互浣跨敤缃戠粶鍒嗘瀽浠祴閲廠鍙傛暟,骞跺€熷姪鍙插瘑鏂渾鍥句娇鐢↙C鍏冧欢鏉ヨˉ鍋胯繖绉嶄笉鍖归厤銆?br /> If there‘‘s mismatching you can use network analyser to measure the S-parameters and use LC conponents to compensate the mismatch using Smith chart.

73. 鍦ㄧ綉鎴夸腑娴嬭瘯LNA鎺ユ敹鐏垫晱搴?娴嬭瘯鐐瑰簲璇ラ€夋嫨鍝効鐐逛笂鏈€浣筹紵
绛旓細閫氬父娴嬭瘯RX鐏垫晱搴?鑰屼笉娴嬭瘯LNA鐏垫晱搴︺€?br />
74. 鍦ㄥ皠棰戠數璺瘮濡傛斁澶у櫒鐨勮璁′腑,鍏剁瀛愮殑淇″彿鍦颁笌鍋忕疆鐢佃矾鐨勭數婧愬湴鏄惁鍒嗗紑涓哄ソ,鎴栬€呰嚦灏戝湪鍚屼竴灞傚垎寮€锛?br /> 绛旓細涓€鑸笉闇€瑕佸垎寮€淇″彿鍦板拰鐢垫簮鍦般€?br /> Normally you don‘‘t need to seperate the ground of power supply with the ground of amplifier銆?br />
75. 涓嶅皯灏勯PCB甯冩澘鍦ㄧ┖鍩熷嵆鏃犲厓浠跺拰璧扮嚎鐨勫湴鏂规病鏈夊竷澶ч潰绉湴,杩欏浣曡В閲婏紵鍦ㄥ井娉㈤娈垫槸鍚﹀簲涓嶄竴鏍凤紵
绛旓細鍙互鍦―C绾胯矾涓婂姞瓒虫暟鐨勫皬鐢靛櫒銆?br /> you can add enough small capacitors on DC line.

76. 鐩墠鏈夋病鏈夌疆浜庝綆娓╃幆澧冧腑鐨勬斁澶у櫒绠″瓙澶栭攢锛?br /> 绛旓細鏀惧ぇ鍣ㄧ殑宸ヤ綔娓╁害鑼冨洿搴旇鍦?10-8鈩?鍙互鏌ョ湅鍙傛暟琛?涓婇潰鐨勮瀹氬簲璇ヤ篃鏄姝ゃ€?br /> For amplifier it should have its working temperature range like -10-85c, you can check the datasheet,it should have this specification.

77. 鎵嬫満RF IC澶勭悊淇″彿鐨勫師鐞嗗浣曪紵
绛旓細褰撳皠棰?涓(RF/IF)IC鎺ユ敹淇″彿鏃?绯绘帴鍙楄嚜澶╃嚎鐨勪俊鍙?绾?00Hz锝?GHz)缁忔斁澶с€佹护娉笌鍚堟垚澶勭悊鍚?灏嗗皠棰戜俊鍙烽檷棰戜负鍩哄甫,鎺ョ潃鏄熀甯︿俊鍙峰鐞?鑰孯F/IF IC鍙戝皠淇″彿鏃?鍒欐槸灏?0KHz浠ヤ笅鐨勫熀甯?杩涜鍗囬澶勭悊,杞崲涓哄皠棰戦甯﹀唴鐨勪俊鍙峰啀鍙戝皠鍑哄幓銆?br />
78. 涓€鑸墜鏈哄皠棰?涓妯″潡鐢卞摢浜涢儴鍒嗙粍鎴愶紵
绛旓細涓€鑸墜鏈哄皠棰?涓妯″潡绯荤敱鏃犵嚎鎺ユ敹銆佷俊鍙峰悎鎴愪笌鏃犵嚎鍙戝皠涓変釜鍗曞厓缁勬垚,鍏朵腑鏃犵嚎鎺ユ敹鍗曞厓绯荤敱灏勯澶寸銆佹贩娉㈠櫒銆佷腑棰戞斁澶у櫒涓庤В璋冨櫒鎵€缁勬垚;淇″彿鍚堟垚閮ㄤ唤鍖呭惈鍒嗛厤鍣ㄤ笌閿佺浉鍥炶矾;鏃犵嚎鍙戝皠鍗曞厓鍒欑敱鍔熺巼鏀惧ぇ鍣ㄣ€丄GC鏀惧ぇ鍣ㄤ笌璋冨彉鍣ㄧ粍鎴愩€?br />
79. 鎵嬫満鍩哄甫澶勭悊鍣ㄧ殑缁勬垚鍜屼富瑕佸姛鑳芥槸浠€涔堬紵
绛旓細甯歌鎵嬫満鍩哄甫澶勭悊鍣ㄥ垯璐熻矗鏁版嵁澶勭悊涓庡偍瀛?涓昏缁勪欢涓篋SP銆佸井鎺у埗鍣ㄣ€佸唴瀛?濡係RAM銆丗lash)绛夊崟鍏?涓昏鍔熻兘涓哄熀甯︾紪鐮?璇戠爜銆佸０闊崇紪鐮佸強璇煶缂栫爜绛夈€?br />
80. 濡備綍鐞嗚В鎵嬫満鐨勫皠棰戙€佷腑棰戝拰鍩洪锛?br /> 绛旓細鎵嬫満鍐呴儴鍩烘湰鏋勯€犱緷涓嶅悓棰戠巼淇″彿鐨勫鐞嗗彲鍒嗘垚灏勯锛堬疾锛︼級銆佷腑棰戯紙锛╋鸡锛夊強鍩洪锛堬饥锛︼級涓夊ぇ閮ㄥ垎,灏勯璐熻矗鎺ユ敹鍙婂彂灏勯珮棰戜俊鍙?鍩洪鍒欒礋璐ｄ俊鍙峰鐞嗗強鍌ㄥ瓨绛夊姛鑳?涓鍒欐槸灏勯涓庡熀棰戠殑涓粙妗ユ,浣夸俊鍙疯兘椤哄埄鐢遍珮棰戜俊鍙疯浆鎴愬熀棰戠殑淇″彿銆?br />
81. 鎵嬫満鏈€鍚庣殑鍙戝皠棰戠巼鏄湪890锛嶏紞915Mhz,杩欐槸璋冮娉㈣繕鏄皟骞呮尝锛熸祴浣跨敤gmsk璋冨埗鐨刧sm鎵嬫満鐨勫皠棰戦儴鍒?涓轰綍鍦ㄦ祴璇曟椂浣跨敤鍥哄畾鐨?02.4Mhz鐨勫浐瀹氶鐜囷紵
绛旓細GMSK璋冨埗鎸囬珮鏂渶灏?棰戠Щ閿帶,鏄暟瀛楄皟鍒?鏌愮绋嬪害涓婂彲浠ョ悊瑙ｆ垚鏄皟棰?浣嗛鐜囩殑鏀瑰彉浠ョ鏁ｇ殑锛堜笉杩炵画鐨勶級鏂瑰紡杩涜,鑰岃皟棰戠函绮规槸妯℃嫙璋冨埗,棰戠巼鐨勬敼鍙樻槸杩炵画鐨勩€?br /> 浠?90MHZ鍒?15MHZ鍏?5MHZ棰戝甫瀹藉害,淇￠亾闂撮殧涓?00KHZ锛堝嵆0.2MHZ锛?鍏辨湁125涓笂琛屼俊閬?娴嬭瘯鏃朵笉鍙兘125涓俊閬撻兘娴?閫氬父浼氶€?涓湁浠ｈ〃鎬х殑棰戠偣锛堜俊閬擄級,涓よ竟涓や釜,涓棿涓€涓?902.4MHZ鍒氬ソ鏄腑闂寸殑淇￠亾銆?br />
82. 鎵嬫満娴嬭瘯椤圭洰锛氬皠棰戣浇娉㈠姛鐜囥€佹椂闂?鍔熺巼鍖呯粶銆佺浉浣嶈宸€佹帴鏀舵姤鍛婄數骞崇殑鑻辨枃琛ㄨ揪鏄粈涔堬紵
绛旓細灏勯杞芥尝鍔熺巼锛歊F Carrier Power;鏃堕棿/鍔熺巼鍖呯粶锛歍ime/Power Template;鐩镐綅璇樊锛歅hase Error;鎺ユ敹鎶ュ憡鐢靛钩锛歊SSI銆?br />
83. 鐜板湪杈冩祦琛?鐨勫皠棰戜豢鐪熻蒋浠舵湁鍝簺锛?br /> 绛旓細涓€鑸潵璇寸敓浜у皠棰戝櫒浠剁殑鍘傚晢閮芥湁杩欐牱鐨勮蒋浠躲€傚EIC鐨勪骇鍝佸氨鏈夎繖鏍风殑杞欢,鍙灏嗚璁＄數璺殑鍣ㄤ欢鍙傛暟杈撳叆,鍗冲彲銆傜洰鍓嶈緝娴佽鐨勫皠棰戜豢鐪熻蒋浠舵湁锛欻P-ADS銆丄DS銆乵icrowave office 銆丄nsoft绛夈€?br />
84. 鎵嬫満涓昏鏈夊熀甯﹀拰灏勯缁勬垚,灏勯鐜板湪寰堝IC鍘傚閮藉凡缁忔湁鍗曡姱鐗囦骇鍝併€傚悓鏃跺熀甯︿篃鏈夊皢DSP鍜孉RM鏍搁泦鎴愬湪涓€鍧桰C涓€俆I鐩墠鏄惁鏈夊崟鑺墖鐨勫熀甯︼紵
绛旓細鐩墠TI鐨勬暟瀛楀熀甯﹁姱鐗囦腑宸茬粡鎶夾RM7鍜孌SP闆嗘垚鍦ㄤ竴璧蜂簡銆?/div>