Coaxial phase shifter for transverse electromagnetic transmissio

Wave transmission lines and networks – Coupling networks – Delay lines including long line elements

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333 24C, 333156, 333245, H01P 118

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active

046161953

ABSTRACT:
A coaxial phase shifter for shifting the phase of a signal being transmitted along a transverse electromagnetic transmission line. The phase shifter is in line with the transmission line's inner conductor, such that it is very compact and such that the transmission line's outer conductor need not be modified. The phase shifter includes electrically-conductive fingers arranged in spaced, confronting relationship with each other, to capacitively couple the signal from one segment of the transmission line's inner conductor to another. In addition, the phase shifter is configured to provide an input impedance at both of its ends that matches the characteristic impedance of the transmission line.

REFERENCES:
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patent: 4088970 (1978-05-01), Fassett et al.
patent: 4365214 (1982-12-01), Shillady
Matthaei et al.-"Microwave Filters, Impedance Matching Networks and Coupling Structures", McGraw-Hill, New York, copyright 1964; pp. 360-364.
Ghirardi-"Radio Physics Course", Radio and Technical Publishing Co. New York City, Jun. 1937; pp. 196-198.
"A Class of Minimum-Phase Microwave Filters with Simultaneous Conditions on Amplitude and Delay", S. O. Scanlan, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-19, No. 9, Sep. 1971.
"Coaxial Bandpass Filter Design", W. A. Davis, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-19, No. 4, Apr. 1971.
"Design Procedure for Coaxial, High-Pass Filters", Glyn Bostick, Electronic Design, Apr. 13, 1960.
"The Practical Realization of Series-Capacitive Couplings for Microwave Filters", Leo Young, Stanford Research Institute, The Microwave Journal Dec. 1962.
"A Synthesis Procedure for Transmission Line Networks", A. I. Grayzel, IRE Transactions on Circuit Theory.

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