Active power splitter

Details Active power splitter Active power splitter

1990-04-10

1991-09-03

LaRoche, Eugene R.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333100, 333 25, 307571, 307244, 307513, H03H 748

Patent

active

050458221

ABSTRACT:
Input power is applied to an input inductor/capacitor combination. The gates of each of two FETs are connected to the other side of the input inductor. The source of each FET is connected to ground potential. The drain of the first FET is connected to a first output port, and the drain of the second FET is connected to a second output port. A signal input on the drain of one of the FETs is 180.degree. out of phase with the same signal passing through the two FETs to the drain of the other FET. The gate and drain of the first and second FETs have series-connected resistance/inductance feedback networks to give input and output match. A series-connected isolation resistor and inductor are connected between the first and second output ports for feeding signals of reduced amplitude to offset signal feedback through the FETs.

REFERENCES:
patent: 4580114 (1986-04-01), Upadhyayula
S. Cohn, "A Class of Broadband Three-Port TEM-Mode Hybrids", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-16, No. 2, Feb. 1968, pp. 110-116.
Saleh, "Planar Electrically Symmetric n-Way Hybrid Power Dividers/Combiners", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-28, No. 6, Jun. 1980, pp. 555-563.
Wahi, "Wideband, Unequal Split Ratio Wilkinson Power Divider", Microwave Journal, Sep. 1985, pp. 205-209.
Hanna et al., "A Wide-Band 12-GHz 12-Way Planar Power Divider/Combiner", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-34, No. 8, pp. 896-897, Aug. 1986.
Madihian et al., "GaAs-Monolithic IC's for an X-Band PLL-Stabilized Local Source", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-34, No. 6, Jun. 1986, pp. 707-713.
Bosisio, et al., "Computer-Aided Evaluation of Manufacturing Tolerances of an Optimized, Wideband Wilkinson Power Divider", Microwave Journal, Apr. 1987, pp. 155-166.
Wang et al., "Manufacturing Pass Rate Predictions of an Optimized 2 to 18 GHz Wilkinson Power Divider in Microstripline", Microwave Journal, Dec. 1987, pp. 115-122.
Hamadallah, "Microstrip Power Dividers at mm-Wave Frequencies", Microwave Journal, Jul. 1988, pp. 115-127.
Burgess, "Unequal Power Division with a Lumped Element Divider", RF Design, Jun. 1988, pp. 69-73.
Beckwith et al., "Wide Bandwidth Monolithic Power Dividers", Microwave Journal, Feb. 1989, pp. 155-160.
Kanazawa et al., "A 15Ghz Single Stage GaAs Dual-Gate FET Monolithic Analog Frequency Divider with Reduced Input Threshold Power", IEEE 1988 Microwave and Millimeter-Wave Monolithic Circuits Symposium, pp. 47-49.
Barta et al., "Surface-Mounted GaAs Active Splitter and Attenuator MMIC's Used in a 1-10GHz Leveling Loop", IEEE Transactions on Microwave Theory and Techniques, V. MTT-34, No. 12, Dec. 1986, pp. 1569-1575.
Barta et al., "A 2 to 8 GHz Leveling Loop Using a GaAs MMIC Active Splitter and Attenuator", IEEE, 1986, pp. 75-79.
Harvey et al., "A Low Noise GaAs MMIC Satellite Downconvertor for the 6 to 4 GHz Band", IEEE MTT-S Digest, 1987, pp. 233-236.

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