Frequency selective screen having sharp transition

Details Frequency selective screen having sharp transition Frequency selective screen having sharp transition

1986-08-14

1988-11-15

Sikes, William L.

Communications: radio wave antennas

Antennas

Antenna components

343779, H01Q 1500, H01Q 1900

Patent

active

047853107

ABSTRACT:
A frequency selective screen (18) is employed as a diplexer to separate each of one or more radio frequency signals into first and second bands of frequencies by allowing the first band of frequencies to pass therethrough and reflecting the second band of frequencies. The screen (18) includes an array of discrete, electrically conductive elements (32), preferably copper, formed on a substrate (33) such as a layer of polyimide. The conductive elements (32) possess a geometry which results in an equivalent electrical circuit (50) that exhibits parallel resonance, high impedance within the first band of frequencies and series resonance, low impedance within the second band of frequencies, thereby transmitting the signal in the first frequency band and reflecting the signal in the second frequency band. The screen (18) may include first and second portions (18a, 18b) in which the conductive elements (32) are respectively oriented along different axes to respectively separate horizonally and vertically polarized signals. The screen (18) may be employed in a satellite (10) to separate transmit and receive frequencies.

REFERENCES:
patent: 3148370 (1964-09-01), Bowman
patent: 4017865 (1977-04-01), Woodward
patent: 4645487 (1987-04-01), Sureau et al.
patent: 4684954 (1987-08-01), Sureau et al.
Arnaud et al., "Resonant-Grid Quasioptical Diplexer", Electronics Letters, 13 Dec. 1973, vol. 9, No. 25, pp. 589-590.
Chen et al., "Wideband Sharp Frequency Cutoff Dichroic . . . Applications ", APS Int'l Symposium Digest, Atnennaas and Prop., Albuquerque, N.M., 24-28 May 1982, pp. 463-466.

Affiliated with

Also associated with

Rating

Frequency selective screen having sharp transition does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency selective screen having sharp transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency selective screen having sharp transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1105911