ITE Technical Report
Online ISSN : 2433-0914
Print ISSN : 0386-4227
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Volume 16, Issue 17
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1992 Volume 16 Issue 17 Pages Cover1-
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_Cover1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    1992 Volume 16 Issue 17 Pages Toc1-
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_Toc1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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  • THE EFFECT OF SHORT PULSE METHOD IN THE ROOM
    Osamu HASHIMOTO, Yoshinori MATSUMOTO
    Article type: Article
    1992 Volume 16 Issue 17 Pages 1-5
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    In this paper, the measurement method of reflection from objects by short pulse method in the room is discussed. For 30×30 cm plate, the measurable range of about -40~-50dB in X~ku band is obtained. Reflection pattern of rectangular flat plates as a function of aspect angle and RCS of flat plate are measured by this measurement method.
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  • A Study on a Channel Assignment Method
    kazuya Sato, minoru Okada, Shinsuke Hara, norihiko Morinaga
    Article type: Article
    1992 Volume 16 Issue 17 Pages 7-12
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_7
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    A multicarrier modulation technique has been studied to provide an indoor wide-band digital radio transmission. However, a variable bit rate transmission capability is necessary in multi-media communications. In this paper, we propose a new channel assignment method appropriate to multicarrier modulation systems. Then we show that the proposed method can provide an variable bit rate transmission with high band width efficiency.
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  • A LOOP ANTENNA WITH HIGH GAIN FOR MIDIUM-WAVE RADIO RECEPTION
    Katsumi Takasugi, Junichi Yamaura
    Article type: Article
    1992 Volume 16 Issue 17 Pages 13-18
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_13
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    On midium-wave radio brordcasting service, the field strength in an area among the mountains which is a long distance from the transmitting station is generally small. Even in the suburbs,the field strength in a loom of a reinforced concrete building also may be small. To make up for such a shortage of field strength on the reception side,we developed a simple antenna with high gain.
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  • Total supervising equipment for medium wave AM radio transmitter
    Yuji OGATA, Kazuaki WAKAI, Tadao SUGITA, Toshio MORITA, Yasuo MOGI
    Article type: Article
    1992 Volume 16 Issue 17 Pages 19-24
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_19
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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    New type of supervising equipment for the transmitting station was developed in NHK Tokyo radio station. This equipment can be supervised for operation of the AM broadcasting transmitter and these subsidiary systems, on condition. There are many display items in this equipment, for example, transmitter output power, load impedance condition, and efficiency of the high power amplifier. And the equipment has a two interface ports, one is GP-IB digital interface port and other one is analog signal outputs port which used for the data logging or additional local area monitoring networks.
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  • Development of new SIT for Medium-Wave High power Radio transmitter
    Hisashi Naka, Takehiko Yamaguchi, Yoshihiko Nasu, Kanehisa Haeiwa, Eij ...
    Article type: Article
    1992 Volume 16 Issue 17 Pages 25-29
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_25
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    In order to transistorize 300〜500kW radio transmitters ,we develped a new type of SIT with two times breakdown voltage, and power capacity compared to conventional SITS used in 20〜100kW radio transmitters. We obtained 86% or more drain efficiency at a frequency of 550kHz by use of Drain Efficiency-Maximizing theory in designing of the new SIT.
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  • A 7-GHz Band Subminiature FPU Transmitter
    Hideo MITSUMOTO, Kazuo IMAI, Masaru FUJITA, Takao MURATA
    Article type: Article
    1992 Volume 16 Issue 17 Pages 31-36
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_31
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    A compact, lightweight and low-cost FPU transmitter was developed for emergency news gatherings. It consists of a 7-GHz-band FET direct modulator and a flat panel antenna. The modulator uses a FET, a dielectric resonator (DR) and two varactors. The output power of 22dBm, and the DG and the DP of less then 3% and 2° are obtained, respectively. The flat panel antenna is constructed by four rectangular patches on a teflonglass substrate and a gain of 13 dBi is obtained.
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  • [title in Japanese]
    Article type: Appendix
    1992 Volume 16 Issue 17 Pages App1-
    Published: February 27, 1992
    Released on J-STAGE: October 06, 2017
    DOIhttps://doi.org/10.11485/tvtr.16.17_App1
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
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