Title:
ULTRA-WIDEBAND LOW-FREQUENCY RADIATION UNIT CAPABLE OF SUPPRESSING HIGH-FREQUENCY PARASITIC RADIATION
Document Type and Number:
WIPO Patent Application WO/2021/027350
Kind Code:
A1
Abstract:
An ultra-wideband low-frequency radiation unit capable of suppressing high-frequency parasitic radiation comprises a dielectric substrate. A half-wave oscillator is provided on a front surface of the dielectric substrate. The half-wave oscillator is specifically a U-shaped end opening formed by a radiation arm. A filter circuit is provided on a rear surface of the dielectric substrate. The filter circuit comprises an oscillator radiation arm coupling branch, a high-frequency parasitic radiation suppression branch, and an oscillator radiation arm end coupling portion. The oscillator radiation arm coupling branch comprises a low-impedance line. The high-frequency parasitic radiation suppression branch comprises a high-impedance line. The low-impedance line is connected to the high-impedance line. An end of the low-impedance line is coupled to a corresponding end of the radiation arm. The high-impedance line is coupled to the oscillator radiation arm end coupling portion. In the radiation unit designed by the solution, the filter circuit consisting of elements of different impedance is provided on a lower layer of the open half-wave oscillator, thereby extending the radiation arm of the open half-wave oscillator, greatly broadening the bandwidth of the low-frequency radiation unit, achieving suppression of high-frequency parasitic radiation, and fundamentally resolving the issue of mutual coupling between high frequencies and low frequencies.
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Inventors:
HONG HEZHI (CN)
LI YUAN (CN)
FENG HAIMING (CN)
ZHANG YA (CN)
ZHANG FENGCHEN (CN)
LI YUAN (CN)
FENG HAIMING (CN)
ZHANG YA (CN)
ZHANG FENGCHEN (CN)
Application Number:
PCT/CN2020/090061
Publication Date:
February 18, 2021
Filing Date:
May 13, 2020
Export Citation:
Assignee:
NDK KUNSHAN CO LTD (CN)
International Classes:
H01Q1/38; H01Q5/50
Foreign References:
| CN110459867A | 2019-11-15 | |||
| CN105896071A | 2016-08-24 | |||
| CN109103591A | 2018-12-28 | |||
| CN207883897U | 2018-09-18 | |||
| CN110011048A | 2019-07-12 | |||
| EP2950385A1 | 2015-12-02 |
Attorney, Agent or Firm:
SUZHOU XIANGYUAN PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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