Quasi active MIMIC circulator

Details Quasi active MIMIC circulator Quasi active MIMIC circulator

2007-10-29

2009-06-02

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S02400C

Reexamination Certificate

active

07541890

ABSTRACT:
A circulator capable of simultaneous transmit and receive operations, high frequency, and high isolation and broadband performance comprising: an antenna port; a transmission port; a receiving port; wherein each port is connected to a 90 degree combiner/divider for splitting an input signal into two output components, the said output components have a ninety degrees relative phase difference to each other; each of said 90 degree combiner/dividers in addition to the connection to the above mentioned ports has at least two output connections each of which are connected to a Y-junction and if a fourth connection, said fourth connection is attached to a matching load circuit; this arrangement of circuits allows the portion of the phase shifted signals from the transmit port to enter the antenna 90 degree combiner/divider and be enhanced at the antenna port, while the rest of the signal enters the receive 90 degree combiner/divider and are phased cancelled; said arrangement allows the signals from the antenna port 90 degree combiner/divider to combine in phase at the receive port.

REFERENCES:
patent: 4679010 (1987-07-01), Bahl
patent: 4682176 (1987-07-01), Jones
patent: 4801901 (1989-01-01), Ayasli
patent: 4857935 (1989-08-01), Bates
patent: 4908820 (1990-03-01), Ayasli
patent: 5046155 (1991-09-01), Beyer et al.
patent: 5223805 (1993-06-01), Talcott et al.
patent: 6760572 (2004-07-01), Noori
patent: 2006/0256002 (2006-11-01), Macdonald

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