May 26, 2009 #1 G ganzz_84 Newbie level 2 Joined May 23, 2009 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,293 build swr meter Hi...all, I want to build swr meter for vhf band using pcb fr4,substrate thickness 1,24mm i have some pic of directional coupler design..and confuse about it... my question is 1. can some one give me some formula to design ?? 2. what the difference of two pic ?? are same design ??
build swr meter Hi...all, I want to build swr meter for vhf band using pcb fr4,substrate thickness 1,24mm i have some pic of directional coupler design..and confuse about it... my question is 1. can some one give me some formula to design ?? 2. what the difference of two pic ?? are same design ??
May 26, 2009 #2 FvM Super Moderator Staff member Joined Jan 22, 2008 Messages 52,484 Helped 14,756 Reputation 29,794 Reaction score 14,121 Trophy points 1,393 Location Bochum, Germany Activity points 298,357 swr directional coupler what the difference of two pic Click to expand... The difference is what you see. The small picture shows a 6-port coupler, the large a standard 4-port. SWR meters are often using a 6-port coupler, because it's directivity is nearly unaffected by mismatching of the detector outputs.
swr directional coupler what the difference of two pic Click to expand... The difference is what you see. The small picture shows a 6-port coupler, the large a standard 4-port. SWR meters are often using a 6-port coupler, because it's directivity is nearly unaffected by mismatching of the detector outputs.
May 26, 2009 #3 G ganzz_84 Newbie level 2 Joined May 23, 2009 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,293 rf swr coupler can u or some one give some formula or reference to design 6 port coupler ???
Oct 5, 2010 #4 M Marxman Newbie level 4 Joined Oct 5, 2010 Messages 7 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,283 Location USA Activity points 1,342 Check out Mongia's book on couplers. Very good. Might I suggest you look at a dual directional coupler instead? These are commonly implemented for SWR measurements.
Check out Mongia's book on couplers. Very good. Might I suggest you look at a dual directional coupler instead? These are commonly implemented for SWR measurements.