Oki Electric Industry Co., Ltd.

Yoshio Masuda

Atsushi Fukasawa

Takuro Sato

Hiromi Ando

Tatsumasa Yoshida

Kouji Wada

Jun Ashiwa

A method of remote-registering a telephone number or similar communication control information at a mobile station such as an automobile telephone, and circuitry therefor. The mobile station is conditioned for a remote register mode in response to a command signal which is transmitted from a remote station. A modulated multifrequency signal corresponding to the modulated communication information is sent from the remote station to the mobile station which is in the remote register mode over a communication channel. The mobile station demodulates the modulated multifrequency signal to produce the original multifrequency signal, converts the demodulated multifrequency signal to a digital signal, and then stores the digital signal in a memory.

Method of remote-registering communication control information and

A high frequency filter for frequencies higher than the VHF band comprising of a closed conductive housing (53), a pair of input and/or output means (54) like an antenna provided at both the extreme ends (53-5, 53-6) of said housing (53), a plurality of resonators (51-1 through 51-5, and 51a-1 through 51a-5) arranged on a straight line between said antennas (54), each of said resonators having an elongated inner conductor (51a-1 through 51a-5) with a circular cross section, and an elongated rectangular dielectric body (51-1 through 51-5) surrounding said inner conductor, one end of each of said resonators being fixed at the single plane (53-1) of the housing (53) and the other end of each of said resonators being free standing. The length of said inner conductor and the dielectric body is substantially 1/4 wavelength, and the duration (52-1 through 52-4 ) between two resonators is determined according to the specified coupling coefficient for the desired characteristics of the filter. Due to the rectangular dielectric body (51-1 through 51-5), each resonator is stably mounted on the housing (53), and then, the stable characteristics of the filter is obtained. Thus, the use in a vibrated circumstance like a mobile communication is possible. That rectangular dielectric body (51-1 through 51-5) also provides the larger coupling coefficients between resonators, and then, the wideband filter can be obtained.

High frequency filter

A high frequency filter for frequencies higher than the VHF band comprises a closed conductive housing, a pair of input and/or output means like an antenna provided at both the extreme ends of said housing, a plurality of resonators arranged on a straight line between said antennas, each of said resonators having an elongated inner conductor and a cylindrical dielectric body surrounding said inner conductor, one end of each of said resonators being fixed on the single plane of the housing and the other end of each of said resonators being free standing, and the length between each of the resonators being defined according to the specified coupling coefficient for the desired characteristics of the filter. The present filter utilizes the coupling effect between resonators by the displacement current relating to surface TM mode and the conductive current relating to TEM mode. Therefore, no coupling means for providing the coupling between resonators is provided.

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Tokyo, Japan

Yoshio Masuda