Title :
Multiplexers and their integration with crystal video receivers
Author :
Dean, J.E. ; Thornton, M.J.
Author_Institution :
Filtronic Components Ltd., Shipley, UK
fDate :
6/1/1982 12:00:00 AM
Abstract :
Broadband, highly selective, low-loss contiguous multiplexers have been developed in the form of suspended-substrate-stripline (SSS) devices. These multiplexers can have channel bandwidths covering at least an octave (up to a decade for the lowest-frequency channel) with a passband insertion loss less than 1 dB and stopband attenuations greater than 60 dB within only 5% of the crossover frequencies. Moreover, these devices can be made extremely thin and lightweight; typically, a diplexer covering an octave band per channel weighs less than 15g. The suspended-substrate-stripline approach enables the direct integration of other microwave components onto the substrate to produce complete high-performance subsystems. A DC-coupled crystal log video receiver weighing only 230 g and enclosed in a 7.5 in3 box has been produced to cover the bands 4¿¿8, 8¿¿12 and 12¿¿18 GHz using the above ideas.
Keywords :
multiplexing equipment; receivers; strip lines; crystal video receivers; diplexer; direct integration; multiplexers; passband insertion loss; stopband attenuations; suspended-substrate-stripline devices;
Journal_Title :
Communications, Radar and Signal Processing, IEE Proceedings F
DOI :
10.1049/ip-f-1.1982.0022