Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-07-24
2007-07-24
Nguyen, Lee (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C324S642000, C333S248000
Reexamination Certificate
active
10712140
ABSTRACT:
An automatic, frequency selective microwave tuner, used for load pull transistor testing, is capable of generating independently controllable reflection factors, both in amplitude and phase, at several, harmonic or not, frequencies simultaneously. The tuner employs horizontally and vertically adjustable high Q resonant probes and replaces, when used in harmonic load pull set-ups, otherwise required combinations of wide-band tuners with harmonic rejection tuners or wide-band tuners and frequency discriminators (diplexers or triplexers).
REFERENCES:
patent: 6297649 (2001-10-01), Tsironis
patent: 6515465 (2003-02-01), Kiyokawa et al.
Brown, J. “Coaxial Tuners Control Impedance to 65GHz”, Microwaves & RF, Jan. 2003, pp. 97-100, vol. 42, No. 1, Penton Media Inc., Cleveland, OH, USA.
ATN Microwave Inc., “A Load Pull System with Harmonic Tuning”, Microwave Journal, Mar. 1996.
Tsironis, C. “System Performs Active Load-Pull Measurements”, Microwaves & RF, Nov. 1995, p. 102-108.
“Device Characterization with Harmonic Source and Load Pull”, Maury Microwave Inc., Dec. 2000.
Tsironis, C. “Product Note 44: Programmable Harmonic Tuner, PHT”, Focus Microwaves, Inc., Nov. 1997.
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