Multioctave spatial power combining in oversized coaxial waveguide

Multioctave spatial power combining in oversized coaxial waveguide

We describe a multioctave power-combiner structure using finline arrays in an oversized coaxial waveguide. The spectral-domain method (SDM) is used to compute the propagation constant in this structure, and is verified with HFSS simulations. The SDM method is then employed to synthesize broad-band t...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2002-05, Vol.50 (5), p.1355-1360
Hauptverfasser: Pengcheng Jia, Lee-Yin Chen, Alexanian, A., York, R.A.
Format: Artikel
Sprache:eng
Schlagworte:
Amplifiers
Arrays
Assembly
Circuit simulation
Coaxial components
Coaxial waveguides
Computational modeling
Coupling circuits
Finline
Finlines
Impedance
Integrated circuit synthesis
Microwaves
MMICs
Noise levels
Propagation constant
Spectra
Transformers
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Beschreibung
Zusammenfassung:We describe a multioctave power-combiner structure using finline arrays in an oversized coaxial waveguide. The spectral-domain method (SDM) is used to compute the propagation constant in this structure, and is verified with HFSS simulations. The SDM method is then employed to synthesize broad-band tapered impedance transformers in finline for coupling energy to and from a set of monolithic microwave integrated circuit (MMIC) amplifiers. A modular assembly is described using a sectoral tray architecture. The concept is demonstrated for a 32-MMIC system using low-power traveling-wave amplifier MMICs, providing a 3-dB bandwidth of 13 GHz (3-16 GHz). An output combining loss of 1 dB is estimated from the small-signal measurements, suggestion a combining efficiency of /spl sim/75% for 32 MMICs.
ISSN:0018-9480
1557-9670
DOI:10.1109/22.999150