Broadband microwave amplifier

Amplifiers – Miscellaneous – Amplifier protection means

Reexamination Certificate

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C330S302000, C330S251000

Reexamination Certificate

active

07345539

ABSTRACT:
A Class-E load circuit topology suitable for switching mode Power Amplifiers (PAs). The inventive load includes a shunt inductive element coupled to an output of said amplifier; a series inductive element coupled to said output of said amplifier; and a series capacitive element coupled to said series inductive element. In the illustrative embodiment, the inventive load is operable at frequencies in the range of 8-10 GHz and the shunt inductive element is an inductive bias line for said amplifier. The invention enables an advantageous Class-E amplifier design comprising an input matching network; an active device coupled to the input matching network and a load coupled to the active device and implemented in accordance with the present teachings. Also disclosed is a method for designing a load for use with a Class-E amplifier including the steps of: providing a lumped equivalent circuit representation of the load; optimizing the lumped equivalent circuit representation of the load to achieve near ideal current and voltage operational characteristics over a predetermined frequency range using a time domain simulation; transforming the optimized lumped equivalent circuit representation of the load to a distributed circuit representation; and optimizing the distributed circuit representation of the load to achieve near ideal current and voltage operational characteristics over a predetermined frequency range using a time domain simulation.

REFERENCES:
patent: 3919656 (1975-11-01), Sokal et al.
patent: 4178556 (1979-12-01), Attwood
patent: 4763087 (1988-08-01), Schrader et al.
patent: 5146178 (1992-09-01), Nojima et al.
patent: 6121840 (2000-09-01), Sakusabe
patent: 6211749 (2001-04-01), Yuzurihara et al.
patent: 6232841 (2001-05-01), Bartlett
patent: 6552610 (2003-04-01), Grebennikov et al.
patent: 6618276 (2003-09-01), Bennett
patent: 6784732 (2004-08-01), Hajimiri et al.
patent: 6937096 (2005-08-01), Wight et al.
patent: 6949978 (2005-09-01), Tayrani et al.
patent: 2004/0008082 (2004-01-01), Dow
patent: 2004/0027209 (2004-02-01), Chen
patent: 2004/0113689 (2004-06-01), Hajimiri
Sokol, N.O., et al, “Class-E—A new class of high efficiency tuned single-ended switching power amplifier,” IEEE JSSC, vol. SSC-10, pp. 168-176, Jun. 1975.
Raab, F.H., et al, “Solid State Radio Engineering,” John Wiley & Sons, 1980, pp. 432-470.
Sowlati, T., et al, “Low Voltage, HIgh Efficiency Class E GaAs Power Amplifiers for Mobile Communications,” IEEE GaAs IC Symposium Digest 1994, pp. 171-174.
Mader, T., et al, “Switched-Mode High-Efficiency Microwave Power Amplifiers in a Free-Space Power Combiner,” IEEE MTT, vol. 10, Oct. 1998, pp. 1391-1398.
Watson, P., et al, “Ultra-High Efficiency Operation Based on an Alternative Class-E Mode,” IEEE GaAs IC Symposium Digest 2000, pp. 53-56.
Tayrani, R., “A Monolithic X-band Class-E Power Amplifier,” IEEE GaAs IC Symposium, pp. 205-208, Oct. 2001.
Sokal, N.O., “RF power amplifiers-classes A through S”, Electro/95 International Profesional Program Proceedings, Boston, MA, USA, Jun. 21-23, 1995, New York, NY, USA, IEEE, US, pp. 335-400.

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