Radiation source

Details Radiation source Radiation source

2011-08-16

2011-08-16

Ismail, Shawki S (Department: 2819)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

C331S00100A, C331S018000, C331S025000, C331S057000

Reexamination Certificate

active

07999624

ABSTRACT:
A source of radiation comprises a first low frequency oscillator200for providing a reference signal and a plurality of phase shifters210a,210b,210ccoupled to the first oscillator. In addition there are a plurality of phase locked loops230a,230b,230c, each phase locked loop having a respective Voltage Controlled Oscillator (VCO)240a,240b,240cfor outputting a signal. Each phased locked loop is coupled to a respective one of the phase shifters, so that in use each VCO is phase locked to a reference signal which has been phase shifted by a respective one of the phase shifters. In this way the phase of the radiation output by each VCO may be controlled indirectly by controlling the phase shift of the reference signal. In a preferred embodiment the phase shifters are adjustable to shift the phase by an adjustable amount.

REFERENCES:
patent: 4918405 (1990-04-01), Herleikson
patent: 5325075 (1994-06-01), Rapeli
patent: 5369790 (1994-11-01), Yokota
patent: 5399995 (1995-03-01), Kardontchik et al.
patent: 5483695 (1996-01-01), Pardoen
patent: 5625324 (1997-04-01), Hsu et al.
patent: 6150890 (2000-11-01), Damgaard et al.
patent: 6741846 (2004-05-01), Welland et al.
patent: 7095287 (2006-08-01), Maxim et al.
patent: 7109803 (2006-09-01), Rebel
patent: 7298217 (2007-11-01), Adlerstein et al.
patent: 7324788 (2008-01-01), Ramet et al.
patent: 7372337 (2008-05-01), Nayler
patent: 7496168 (2009-02-01), Leonowich et al.
patent: 2006/0279363 (2006-12-01), Shirasu
patent: WO 2005/099086 (2005-10-01), None
Nagra, A.S., et al., “Distributed Analog Phase Shifters with Low Insertion Loss,” IEEE Trans. Microw. Theory Tech., vol. 47, No. 9, pp. 1705-1711, Sep. 1999.
Barker, N.S., et al., “Optimization of Distributed MEMS Transmission-Line Phase Shifters—U-Band andW-Band Designs,” IEEE Trans. Microw. Theory Tech., vol. 48, No. 11, pp. 1957-1966, Nov. 2000.
Ellinger, F., et al., Varactor-Loaded Transmission-Line Phase Shifter atC-Band Using Lumped Elements, IEEE.Trans. Microw. Theory Tech., vol. 51, No. 4, pp. 1135-1140, Apr. 2003.
Hancock, T.M., et al., “A 12-GHz SiGe Phase Shifter With Integrated LNA,” IEEE Trans. Microw. Theory Tech., vol. 53, No. 3, pp. 977-983, Mar. 2005.
Lu, J., et al., “Active Phased Array Antenna Based on DDS,” IEEE International Symposium, Oct. 14-17, 2003, pp. 511-516 (proceedings), Oct. 2003.
Houghton, A.W., et al., “Phased Array Control Using Phase-Locked-Loop Phase Shifters,” IEEE Proceedings-H (Microw., Antennas and Propagation), vol. 139, No. 1, pp. 31-37, Feb. 1992.
Buchanan, N.B., et al., “Triple Mode PLL Antenna Array,” IEEE MTT-S Digest, International Microw. Symposium 2004, vol. 3, pp. 1691-1694, Jun. 2004.
York, R.A., et al., “Injection- and Phase-Locking Techniques for Beam Control,” IEEE Trans. Microw. Theory Tech., vol. 46, No. 11, pp. 1920-1929, Nov. 1998.
Mak, C.L., et al., “Experimental Study of a Microstrip Patch Antenna with anL-Shaped Probe,” IEEE Trans. Antennas and Propagation, vol. 48, No. 5, pp. 777-783, May 2000.
Wan, K.-C., et al., “Indirect Controlled Phased Source,” IEEE Microw. and Wireless Components Letters, vol. 16, No. 12, pp. 702-704, Dec. 2006.

Affiliated with

Also associated with

Rating

Radiation source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Radiation source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radiation source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2728779