Electronic Resource
Springer
International journal of infrared and millimeter waves
11 (1990), S. 21-30
ISSN:
1572-9559
Keywords:
Millimeter waves
;
phase shift key
;
phase modulator
;
phase switch
;
waveguide
;
finline
;
PIN diode
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A 90° phase switch in finline technique has been developed for application in a W-band homodyne network analyzer. It is realized on a 0.127 mm fibre reinforced teflon substrate in a standard WR 10-waveguide. It employs two low capacitance beam-lead PIN diodes mounted in series to the finline. The waveguides are connected via Dolph-Chebyshev tapers. The analysis of this circuit shows that the diode junction capacitance imposes certain constraints for the wave impedances which must be realized. They can only be met with overlapping antipodal finlines. There are several analytical solutions with different lengths and wave impedances of the transmission line sections. The choice has been taken with respect to bandwidth in the limits imposed by the range of wave impedances which can be realized. Between 90 and 105 GHz, the phase error of the realized modulator is below ±2.5°, and the amplitude imbalance is less than 0.5 dB.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01009811
Permalink
|
Location |
Call Number |
Limitation |
Availability |
