omid_dr
Newbie level 5
Hi all,
I need a compact size image rejection filter for the front-end section of a receiver. The center frequency should be 215 MHz with a 1-dB bandwidth of 30 MHz and good out of band rejection with minimum loss. Microstrip filters may be a good choice, however conventional topologies have large sizes in this frequency (a quarter wave length is about 137mm on a substrate with a dielectric of 10.2). What's your suggestion? Is there any way to reduce microstrip filter sizes in this band or is there any other solution to my problem?
Thanks a lot.
PS: Do you know of any document describing different types of microstrip filters (interdigital, combline, hairpin, hairpin-comb and so on) usages, pros and cons?
I need a compact size image rejection filter for the front-end section of a receiver. The center frequency should be 215 MHz with a 1-dB bandwidth of 30 MHz and good out of band rejection with minimum loss. Microstrip filters may be a good choice, however conventional topologies have large sizes in this frequency (a quarter wave length is about 137mm on a substrate with a dielectric of 10.2). What's your suggestion? Is there any way to reduce microstrip filter sizes in this band or is there any other solution to my problem?
Thanks a lot.
PS: Do you know of any document describing different types of microstrip filters (interdigital, combline, hairpin, hairpin-comb and so on) usages, pros and cons?