Title:
HIGH FREQUENCY OSCILLATOR
Document Type and Number:
Japanese Patent JP3201947
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a high frequency oscillator having a low phase noise characteristics in compatible with that of an oscillator using a dielectric oscillator in the TE01δ mode using a cylindrical dielectric disk while enhancing a characteristics of a microstrip line configured with a small sized planer circuit.
SOLUTION: In the oscillator having a semiconductor element such as a transistor(TR) or a field effect transistor and a resonator made up of a tip open or a tip short-circuit line (resonator 23 is a tip open line resonator), the electric length of the resonator is a 3/4 wavelength or over with respect to a desired frequency and a resistor is inserted in series with resonators 26a, 26b at a position of a node of a current at the desired frequency. Even when the resonator whose electric length at the desired frequency is n/2 wavelength (n=2, 3, 4,...) is in use, spurious oscillation whose oscillated frequency is 1/2 or 1/3 of the desired oscillating frequency is not caused and the high frequency oscillator with more excellent phase noise characteristics is obtained.
Inventors:
Yoshihiko Imai
Kenji Ito
Akio Iida
Kenji Ito
Akio Iida
Application Number:
JP4495896A
Publication Date:
August 27, 2001
Filing Date:
March 01, 1996
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01P3/08; H01P7/08; H03B5/18; (IPC1-7): H03B5/18; H01P7/08
Domestic Patent References:
| JP5211409A | ||||
| JP6229210A | ||||
| JP63292706A | ||||
| JP57170604A | ||||
| JP63197101A | ||||
| JP6253815U | ||||
| JP56165411U | ||||
| JP53132237U | ||||
| JP56167608U |
Other References:
【文献】1994年信学秋大、C-43
【文献】1996年信学ソサイティC-46
【文献】1996年信学総合大C-41
【文献】1996年信学ソサイティC-46
【文献】1996年信学総合大C-41
Attorney, Agent or Firm:
Soga Doteru (6 people outside)