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A novel aperture isolation circuit for use in phased array systems

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4 Author(s)
Jacomb-Hood, A.W. ; General Electric Electron. Lab., Syracuse, NY, USA ; Booth, M.S. ; Houston, D.E. ; Alcorn, T.S.

A novel electronically controlled matching network has been demonstrated as an aperture isolation circuit. This approach offers smaller size, lower weight, and potentially lower cost than circulators. An X-band MMIC (monolithic microwave integrated circuit) realization of this circuit has comparable loss to a circulator. An S-band hybrid realization demonstrated reductions in insertion loss of up to 2.3 dB for antenna VSWRs (voltage standing wave ratios) of up to 5:1 lying within a 100° sector on the Smith chart. One disadvantage of this approach is that it increases the complexity of controlling and calibrating the module

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:38 ,  Issue: 12 )