Scattering of EM waves by homogeneous dielectrics with the use of the method of moments and 3D solenoidal basis functions

✍ Scribed by L. S. Mendes; S. A. Carvalho

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 502 KB
• Volume: 12
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19960820)12:6<327::aid-mop7>3.0.co;2-h

✦ Synopsis

and decreases with frequency. The decrease with frequency is also confirmed by the measurements [20].

For analog applications, the MQWHFET device may be well suited for small phased arrays that require a limited phase coverage (20-40 degrees) with a high power handling capability [17]. One other application where this device could be used is in the optical heterodyne receiver system [18], which requires an analog phase shifter to adjust phase in one of the signal paths from 0 to 45 degrees at 6 GHz with a gain variation of < 2 dB. However, the choice of which device to use for a given application is not only governed by the phase-shift characteristics, but depends upon the system requirements. For those applications, which require a large phase shift of 360 degrees, many devices will have to be cascaded within an area of < 1 mm'. Compared to other active phase-shifter configurations [5, 6, 191, the MQWHFET approach provides better phase shift/voltage sensitivity.