Precision Supercomponents For Critical Applications PSC-4493 SERIES LMDS WIRELESS FILTERS FEATURES DESCRIPTION • PARAMETRIC CONSTANT DELAY BANDPASS FILTERS • MINIMIZED PARABOLIC, LINEAR AND RESIDUAL COMPONENTS OF DELAY • HIGH SELECTIVITY • SMALL SIZE Constant Delay Filters are essential in wireless systems that are transmitting or receiving data at rapid rates in limited bandwidth channels. Here sharp filtering along with constant group delay must be present. To this end, Aeroflex has developed a series of high performance bandpass networks that meet these requirements. • FREQUENCY RANGE 500-5000MHZ APPLICATION: COMMERCIAL WIRELESS SYSTEMS FOR VOICE/DATA/VIDEO These high performance IF Filters utilize a constantdelay / sharp attenuation parametric non-minimum phase function polynomial. The design is based upon minimizing selected coefficients of the power series expansion of the group delay response (linear and parabolic terms) to minimize pulse distortion of the applied signal while providing sharp attenuation characteristics. PSC-4493 SERIES PSC-4493 SERIES SPECIFICATIONS PSC-4493-1 RESPONSE CURVES PSC-4493-1 CHARACTERISTICS LIMITS CENTER FREQUENCY (FC) 1160 MHZ PASSBAND 380 MHZ AMPLITUDE FLATNESS <.2 DB/60 MHZ ATTENUATION AT -310 MHZ FROM FC > 15 DB ATTENUATION AT +290 MHZ FROM FC >15 DB ATTENUATION AT +590 MHZ FROM FC >70DB ULTIMATE ATTENUATION >70 DB TO 3000MHZ INSERTION LOSS AT FC 4 DB MAXIMUM PASSBAND RETURN LOSS 15 DB MINIMUM (IN/OUT) PASSBAND GROUP DELAY 100 PS MAXIMUM MAXIMUM LINEAR DELAY COEFFICIENT OVER PASSBAND < 8 PS/MHZ OVER ANY 60 MHZ MAXIMUM PARABOLIC DELAY COEFFICIENT OVER PASSBAND <.1 PS/MHZ2 OVER ANY 60 MHZ RESIDUAL DELAY OVER PASSBAND <500 PS OVER ANY 60 MHZ OUTLINE DRAWING PSC-4493-1 Figure 1: Overall Response .40 2.000 IN OUT .340 .12 1.76 .060 X 4 .120 .060 x 4 Figure 2: Passband Response .140 PSC-4493 SERIES SPECIFICATIONS PSC-4493-2 RESPONSE CURVES PSC-4493-1 CHARACTERISTICS LIMITS CENTER FREQUENCY (FC) 780 MHZ PASSBAND 40 MHZ AMPLITUDE FLATNESS <.1 DB ATTENUATION AT - 70 MHZ FROM FC > 10 DB ATTENUATION AT +70 MHZ FROM FC >45 DB ATTENUATION AT +140 MHZ FROM FC >55 DB ULTIMATE ATTENUATION >70 DB TO 4000MHZ INSERTION LOSS AT FC 5 DB MAXIMUM PASSBAND RETURN LOSS 15 DB MINIMUM (IN/OUT) PASSBAND GROUP DELAY 500 PS MAXIMUM MAXIMUM LINEAR DELAY COEFFICIENT OVER PASSBAND < 8 PS/MHZ MAXIMUM PARABOLIC DELAY COEFFICIENT OVER PASSBAND <2.5 PS/MHZ2 RESIDUAL DELAY OVER PASSBAND <500 PS OUTLINE DRAWING PSC-4493-2 .340 Figure 3: Overall Response 1.500 IN OUT .340 .12 1.23 .150 .060 x 4 Figure 4: Passband Response .110 .060 X 4 Precision Supercomponents For Critical Applications PSC-4493 SERIES CURVE FIT - 4493-1 CURVE FIT - 4493-2 Precision Supercomponents For Critical Applications 35 South Service Road Plainview, NY 11803 TEL: 516-694-6700 FAX: 516-694-2562