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CA1121006A Expired / Lapsed CA ⏱️ 0.0 years remaining

Broadband frequency divider

Assignee: Department of National Defence
•
Filing: 1979-11-16
•
Granted: 1982-03-30
•
Expires: 1999-11-16
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Abstract

Abstract ABSTRACT A microwave frequency divider operable in 8-16 GHZ range. A circuit resonant at a subharmonic frequency is formed by a pair of input microstrip transmission lines coupled to a pair of output microstrip transmission lines. Each input line is terminated by a varactor diode. The input signal is supplied to the resonant circuit by a pair of microstrip lines functioning as a two stage quarter wave transformer. A metal plate positioned over the resonant circuit and closely spaced from it functions to extend the upper end of the frequency range. A bias supply line for the diodes has a portion passing through a resistive foam block to remove spurious signals. A movable stub is positioned along the bias supply line to extend the lower end of the frequency range.

Inventors

  • 👤 Francois A. Gauthier
  • 👤 William D. Cornish

Bibliographic Details

Application Number —
Jurisdiction CA
Data Source google_patents
Last Synchronized 2026-11-04 23:01
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/16; H03B19/18; H03B19/05

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 79 words
In a microwave frequency divider having a circuit resonant at a subharmonic frequency formed by a pair of input microstrip transmission lines and a pair of output microstrip transmission lines, each input line being terminated by a varactor diode, the output lines being connected to a coplanar waveguide balun, a bias supply line having a quarter wavelength section connected to the varactor diodes the improvement comprising a metal plate substantially co-extensive with the resonant circuit and closely spaced therefrom.
Claim 2
Dependent Claim 79 words
In a microwave frequency divider having a circuit resonant at a subharmonic frequency formed by a pair of input microstrip transmission lines and a pair of output microstrip transmission lines, each input line being terminated by a varactor diode, the output lines being connected to a coplanar waveguide balun, a bias supply line having a quarter wavelength section connected to the varactor diodes the improvement comprising a metal plate substantially co-extensive with the resonant circuit and closely spaced therefrom.
Claim 3
Dependent Claim 26 words
A microwave frequency divider as set out in claim 1 further including a two stage quarter wave transformer coupling the input signal to the resonant circuit.
Claim 4
Dependent Claim 30 words
A microwave frequency diyider as set out in claim 2 further including a resistive foam element around a conductor connected between said bias supply line and a source of potential.
Claim 5
Dependent Claim 21 words
A microwave frequency divider as set out in claim 3 further including a movable stub positioned along said bias supply line.

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