this se r ies of l o w noise amplifiers pr o vides a filtered, l o w-noise gain solution ideal f or applications where higher reliability is c r itical . these filtered l o w noise amplifiers are designed to reduce out-of-band inter f erence while achi e vin g high dynamic r ang e . a pair of dipl ex ed 3-pole ce r amic filters select only the desired gps signals while the l o w-noise gain stage maintains the receiving system ? s sensitivit y . the lna rejects undesired signals b y at least 40 db at 1050, 1410, and 1710 mhz . see the g r aphs on p age 2 f or retu r n los s , rejection s , and gain of a typical unit. the preamplifier is p o w ered b y dc v oltage applied to the center conductor of the output connecto r . optionall y , the unit can be p o w ered through an e xte r nal dc bias connecto r . features and bene ts ? noise figure 1.6 db typical ? dou b le-dipl ex ed preamp filters ? light w eight alumi n um housing ? dual band (l1 and l2) per f o r mance ? coa x ial and e xt e r nal bia s op t ion s ? e n v i r on m en t al s ealing a v aila b l e ? a ppli c a t ion s pe c i f i c pa c k age s a v aila b l e ? s ui t a b le f o r n e w l2 - c s ignal s ? l5 c on f igu r a t ion s a v aila b le upon r eque s t spectrum micro w a v e filtere d low noise ampli e r ce r tified block diagram for gps applications 1227 m h z/ 1575 m h z t ypical performance speci cations f r equency . . . . . . . . . . . . . 1575.42 mhz (l1) 1227.60 mhz (l2) bandwidth . . . . . . . . . . . . 30 mhz min. noise gu r e . . . . . . . . . . . 2.0 db max. vswr . . . . . . . . . . . . . . . 1.5:1 max. gain . . . . . . . . . . . . . . . . 14 db min. gain flatness . . . . . . . . . . +/-0.5 db rejection . . . . . . . . . . . . . 40 db @ 1050, 1410, 1710 mhz bias . . . . . . . . . . . . . . . . . ext bia s , mr01 dc power . . . . . . . . . . . . 5-16 vdc t emperatu r e range . . . . . . -40?c to +71?c all specifications ab o v e measured at 25?c dimensions and connections ? antenna po r t j1 ? recei v er po r t j2 ? sma type f emale connectors ? 2.20"? x 0.080"h e xcluding connectors chassis is machined alumi n um with a ni ck el plate finish. p/n: 310-025103-021 p/n: 310-025103-021 spectrum micro w a v e ? 38166 old stage roa d ? delma r , del a w are 1994 0 ? phone : 302-846-2750 ? f ax : 302-846-388 8 spectrum microwave ? 2707 black lake place ? philadelphia, pennsylvania 19154 ? phone : 215-464-4000 ? f ax : 215-464-4001 ww w .spectrummicrowave.co m
ampli er gain 0 -10 -30 105 1 125 1 145 1 165 1 1751 f requency (mhz) db(|s[1,1]|) loss in db -20 db(|s[2,2]|) filte r ed low noise ampli e r 1227 m h z/ 1575 m h z return loss 15 2 -24 105 1 125 1 145 1 165 1 1751 f requency (mhz) db(|s[2,1]|) gain in db -11 .51 1.79 2.15 ?2.72 1.00 4x ? .17 th r u 2x sma f emale connector 2.20 1.36 .51 .80 j1 j2 dimensions (inches) spectrum micro w a v e ? 38166 old stage roa d ? delma r , del a w are 1994 0 ? phone : 302-846-2750 ? f ax : 302-846-388 8 spectrum microwave ? 2707 black lake place ? philadelphia, pennsylvania 19154 ? phone : 215-464-4000 ? f ax : 215-464-4001 ww w .spectrummicrowave.co m
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