A simple multiple beam lo coupler for SIS heterodyne arrays
| ISSN: |
1572-9559
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|---|---|
| Keywords: |
SIS-mixer ; millimetre-waves ; imaging arrays ; quasi-optical
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract The construction of SIS heterodyne imaging arrays for submillimetre wave-lengths requires multiple coupling of the local oscillator signal. The quasi-optical analogue of a multiple cross-guide coupler, employing 45° beam-splitters successively stacked along the local oscillator beam, allows for individual adjustment of local oscillator power to each channel. We analyse the coupling as a function of the focal ratio of the incident beams and the number of beam widths off-axis through which the coupler is extended, and describe a simple construction method to realise a compact and effective design.
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| Type of Medium: |
Electronic Resource
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| URL: |