Local oscillator signal divider and low-noise converter...

Details Local oscillator signal divider and low-noise converter... Local oscillator signal divider and low-noise converter...

2005-11-29

2005-11-29

Urban, Edward F. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S327000, C455S282000, C455S318000, C333S117000, C333S120000

Reexamination Certificate

active

06970688

ABSTRACT:
A rat race circuit has an annular transmission line formed on a microstrip dielectric substrate. A terminal for port1is formed at any given position of the annular transmission line. Respective terminals for port2and port3are formed at respective positions distant from the position of port1in the counter-clockwise and clockwise directions each by a distance of λg/4 (λg: effective wavelength). Moreover, at the position distant from the position of port2in the counter-clockwise direction by the distance of λg/4, a terminator resistor (R=50Ω) is formed. A local oscillator signal is supplied to port1, and first and second mixer inputs are connected respectively to port2and port3. The local oscillator signal divider and a low noise converter using the divider are thus provided that are scarcely influenced by matching with respect to mixers and provide stable performance and high isolation.

REFERENCES:
patent: 3845461 (1974-10-01), Foreman
patent: 3956706 (1976-05-01), Saul
patent: 4509198 (1985-04-01), Nagatomi
patent: 5903827 (1999-05-01), Kennan et al.
patent: 6507952 (2003-01-01), Miller et al.
patent: 3-235405 (1991-10-01), None
patent: 3-235406 (1991-10-01), None
patent: 5-80006 (1993-10-01), None
patent: 11-68421 (1999-03-01), None

Affiliated with

Also associated with

Rating

Local oscillator signal divider and low-noise converter... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Local oscillator signal divider and low-noise converter..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local oscillator signal divider and low-noise converter... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3475507