MINIATURIZED DIELECTRIC RADIO FREQUENCY FILTER FOR 850 MHz BAND MOBILE RADIO.

Atsushi Fukasawa, Jun Ashiwa, Takuro Sato

Research output: Contribution to conferencePaper

Abstract

A newly designed 806-947 MHz band rf filter has been developed for vehicular communication radio. This newly developed filter features a simple structure, miniaturized size, and light weight. The new waveguide which is the basis of the resonator is constructed from a dielectric rod having a thin central conductor, inserted between two parallel plates. The principal modes of the electromagnetic field propagating along the waveguide are the quasi-TEM mode on the lower frequency side and the quasi-TM//0//1 mode on the higher frequency side of the mode coupling frequency. Two new coupling design methods are employed: spacing control and wire control. In the spacing control method, the required amount of coupling is obtained by slightly changing the spacing between adjacent resonators. The wire control method obtains the expected amount of coupling by changing the number of equi-distantly inserted thin wires and their positions. The lowest spurious spectrum is about 2. 3 GHz. The unloaded Q (Qu) of the resonator is about 1600, and of the resonator having loop excitation, Qu is about 1000. The relative permittivity of the dielectric is 20. 0 and tan delta is 1. 1 multiplied by 10** minus **4 at 6 GHz.

Original languageEnglish
Pages181-186
Number of pages6
Publication statusPublished - 2017 Jan 1
Externally publishedYes
EventIEEE Veh Technol Conf, 29th, Conf Rec of Pap - Arlington Heights, Ill
Duration: 1979 Mar 271979 Mar 30

Other

OtherIEEE Veh Technol Conf, 29th, Conf Rec of Pap
CityArlington Heights, Ill
Period79/3/2779/3/30

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Fukasawa, A., Ashiwa, J., & Sato, T. (2017). MINIATURIZED DIELECTRIC RADIO FREQUENCY FILTER FOR 850 MHz BAND MOBILE RADIO.. 181-186. Paper presented at IEEE Veh Technol Conf, 29th, Conf Rec of Pap, Arlington Heights, Ill, .