Tubis Technology Inc.

Siqi Zhu

James Han Wang

A single stage unequal power combiner is proposed. Instead of conventional combiner plus impedance transformer of 2-stage unequal combiner, the single stage combiner gets rid of the input impedance transformer. The single stage combiner supports adjustable transmission line impedance and reasonable mismatch loss, assuming that the power ratio of the input signals is within a certain range. The single stage combiner also has an adjustable isolation resistor for different power ratios. A structure of switchable branch characteristic impedance, switchable isolation resistor for the unequal combiner is proposed as the preferred embodiment. In one advantageous aspect, broader coverage angle in a single array module can be realized via an antenna diversity switch.

Adjustable unequal power combiner and switch

A single stage unequal power combiner is proposed. Instead of conventional combiner plus impedance transformer of 2-stage unequal combiner, the single stage combiner gets rid of the input impedance transformer. The single stage combiner supports adjustable transmission line impedance and reasonable mismatch loss, assuming the that power ratio of the input signals is within a certain range. The single stage combiner also has an adjustable isolation resistor for different power ratios. A structure of switchable branch characteristic impedance, switchable isolation resistor for the unequal combiner is proposed as the preferred embodiment. In one advantageous aspect, broader coverage angle in a single array module can be realized via an antenna diversity switch.

A method of implementing a combiner or divider network with compact layout design is proposed. A phased-array antenna comprises a plurality of antenna elements, a plurality of phase shifters, and a combiner and/or divider network. The phased-array antenna is capable of forming narrowly focused beams. The array of antenna elements is applied with a set of combined beam coefficients to steer the direction of the beam and to shape the beamwidth to a desired width. The combiner and/or divider network is implemented with a compact layout design, where each combiner or divider in the network is designed with a flexible terminal location to fit different circuits easily to reduce trace loss in the network and to reduce the overall layout size.

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Pasadena, CA, United States of America

Siqi Zhu