| 摘要 |
<p>A simplified construction of an antenna apparatus for both infrared and millimetre-wave radiation is obtained by embedding the infrared detector (2) in a mm-wave lens (3). The lens (3) of, for example, polystyrene transmits the mm-wave radiation to and from the transceiver (1), and the lens performance is not seriously degraded by the embedded detector (2) or its connections (33) or even by a cooler pipe (37) of the infrared detector (2). As well as providing reliable mounting of the infrared detector (2), the arrangement permits the mm-wave transceiver (1) to be located on the optical axis of the lens (3) in a coaxial concentric arrangement for viewing a common scene at both the infrared and mm wavelengths through a common aperture. <IMAGE></p> |
