Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1984-04-26
1986-08-12
Laroche, Eugene R.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333161, 357 237, 357 2314, H03H 1120
Patent
active
046059121
ABSTRACT:
A bidirectional continuously variable phase shifting element is described for incorporation in a monolithic microwave integrated circuit (a circuit which combines both passive and active circuit elements). The preferred active device for use in the phase shifting element is a variable resistance field effect transistor (MESFET), while the preferred passive circuit element is a short transmission line interconnecting the principal electrodes. A variable phase shift for an RF signal passing through the phase shifting element is obtained by adjusting the gate potential of the MESFET between full conduction and nonconduction. The change in conductivity of the MESFET causes the serial impedance of the phase shifting element to vary from a substantially resistive impedance to a substantially capacitively reactive impedance arrangement, which requires only a single active device, is applicable to frequencies generally above 1 GHz, and provides phase shifts up to 45.degree. with reasonable insertion loss and return loss.
REFERENCES:
patent: 3517348 (1970-06-01), Frost
patent: 3602738 (1971-08-01), Bohm
patent: 4160261 (1979-07-01), Casey, Jr. et al.
patent: 4238745 (1980-12-01), Schwarzmann
patent: 4393578 (1983-07-01), Cady et al.
Naster Ronald J.
Windyka John A.
Wolfe Allen R.
Baker Carl W.
General Electric Company
Lang Richard V.
LaRoche Eugene R.
Lee Benny T.
LandOfFree
Continuously variable phase shifting element comprised of interd does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuously variable phase shifting element comprised of interd, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuously variable phase shifting element comprised of interd will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1946947