Analysis of a passive spatial combiner using tapered slotline array in oversized coaxial waveguide

Absiract -We report an enhanced broadband passive combiner structure using a dense slot-line antenna array in an oversized coaxial waveguide. A significant reduction in size has been achieved while maintaining a 6-18GHz bandwidth and capacity for 32 MMIC amplifiers. A broadband slotline to microstrip line transition is developed and monolithically integrated with the slotline antennas, to eliminate a troublesome bond-wire transition in earlier design and provide better compatibility with commercial MMICs. The Spectral Domain Method (SDM) is applied to compute the field in the structure, and small reflection theory is extended to synthesize the waveguide taper and optimized slotline taper array.

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A compact millimeter-wave slotted-waveguide spatial array power combiner

Eswarappa¹,

Hongsmatip²,

Kinayman³

et al.

IEEE MTT-S International Microwave Symposium Digest, 2003

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Abstran -In this paper a new 28 GHz solid-state power amplifier based on a novel SlottecLwaveguide spatial power dividerlcombiner is presented. Innovative wavegnide-slotmicrostrip transitions have been successfully achieved through three-dimensional electromagnetic simulations. An output power of more than 36 dBm was measured at the output of the power amplifier using a four-device combiner. The power combining efficiency of about 80 % has been achieved. The overall size of the power amplifier was only 3.6"x2.4"xl.O".

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Analysis of a passive spatial combiner using tapered slotline array in oversized coaxial waveguide

Cited by 3 publications

References 5 publications

Boradband 60GHz 32-way ring-cavity power combiner

Boradband 60GHz 32-way ring-cavity power combiner

A compact coaxial waveguide combiner design for broadband power amplifiers

A compact millimeter-wave slotted-waveguide spatial array power combiner

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