Patent ID: 6545552
Filing Date: 2003-04-08
Classification: H03B

Abstract:
A local oscillator comprising:a Gunn diode for generating an oscillating signal of millimeter wavelength by using a bias voltage; a resonating member for tuning a power of an oscillating signal and a frequency thereof; an NRD guide for guiding the oscillating signal inputted into an input terminal thereof to an output terminal thereof; an LSE mode suppressor inserted into the input terminal of the NRD guide, for preventing an LSE mode of the oscillating signal transferred from the resonating member from passing therethrough while allowing an LSM mode of the oscillating signal to pass therethrough; and a housing including an upper conductive plate and a lower conductive plate, for accommodating the Gunn diode, the resonating member, the NRD guide, the LSE mode suppressor therewithin; wherein the Gunn diode is vertically buried in a first coupling hole formed at a bottom of the lower conductive plate such that an anode thereof is exposed to an exterior so as to directly transfer a heat generated from the Gunn diode to the lower conductive plate; and wherein the resonating member includes a fixing block which is installed to be in contact with the input terminal of the NRD guide and is formed with a second coupling hole, and a metal rod resonator which is inserted into the fixing block to be arranged in perpendicular to a length direction of the NRD guide, and one end thereof being exposed to make direct contact with an anode of the Gunn diode.