Broadband rf isolator

Details Broadband rf isolator Broadband rf isolator

H - Electricity

01

Q

351/58

H01Q 1/52 (2006.01)

Patent

CA 1166347

Abstract of the Disclosure A broadband RF isolator system for connection between RF devices such as colinear antennas is disclosed. In accordance with this invention, two or more antennas are spaced several wave- lengths apart, connected to coaxial feeds and choked at their adjacent ends to establish the electrical length. In one embodi- ment of the invention, the isolator is formed by placing a second line adjacent the coaxial line connected to the upper antenna. The addition of this second line forms a balanced transmission line having a given characteristic impedance. The second line is ter- minated at one end by a resistor having a resistance equal to the value of the characteristic impedance. In a second embodiment the second line is replaced by a coaxial sleeve which is also terminated at one end with a resistor having a resistance value equal to the characteristic impedance. In four additional embodiments, which are essentially variations of the second basic embodiment, coaxial sleeves are also utilized to form the isolation system.

395807

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