US 7,265,711 B2 · High-frequency oscillator, high-frequency transmission-reception apparatus using the same, radar apparatus, and radar-apparatus-equipped vehicle and small boat equipped with the same

Abstract

A high-frequency oscillator that can tune oscillation characteristics is provided. A high-frequency oscillator includes a Gunn diode serving as a high-frequency oscillation element that generates high-frequency signals, a resonator connected to the Gunn diode, a varactor diode serving as a variable-capacitance element that is disposed on the resonator and changes a resonance frequency, and a bias supply circuit that is connected to the varactor diode and supplies a bias voltage applied in order to change a capacitance. The bias supply circuit includes a trimmable chip resistor serving as a pre-set variable resistor that regulates a bias voltage applied to the varactor diode. By regulating the resistance value of the trimmable chip resistor, it is possible to control the capacitance value of the varactor diode and tune oscillation characteristics to a desired state.

Claims19

Dependent claims

A high-frequency oscillator comprising:

a high-frequency oscillation element for generating high-frequency signals;
a variable-capacitance element of which capacitance changes by applying a bias voltage;
a resonator connected to the high-frequency oscillation element, of which oscillation frequency changes along with the change of the capacitance of the variable-capacitance element;
and
a bias supply circuit connected to the variable-capacitance element, for supplying a bias voltage to be applied to the variable-capacitance element, the bias supply circuit including a pre-set variable resistor for regulating the bias voltage.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/169,222Filed 28 Jun 2005

Priority

JP P2004-19173229 Jun 2004

Published

US 2006/0017606 A126 Jan 2006

Granted

4 Sep 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H03D 9/0641
Mounted on a stripline circuit: located in a hollow waveguide
G01S 7/032
Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver: constructional details for solid-state radar subsystems
G01S 7/034
Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver: duplexers
G01S 7/35
Of systems according to group G01S13/00: details of non-pulse systems

High-frequency oscillator, high-frequency transmission-reception apparatus using the same, radar apparatus, and radar-apparatus-equipped vehicle and small boat equipped with the same

Life of this patent

High-frequency oscillator, high-frequency transmission-reception apparatus using the same, radar apparatus, and radar-apparatus-equipped vehicle and small boat equipped with the same

Life of this patent

Abstract

Claims19