Youhei ISHIKAWA


Planar Type Dielectric Resonator Filter at Millimeter-Wave Frequency
Youhei ISHIKAWA Toshiro HIRATSUKA Sadao YAMASHITA Kenichi IIO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/05/25
Vol. E79-C  No. 5  pp. 679-684
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave Devices for Mobile Communications)
Category: Passive Devices
Keyword: 
dielectric filtermm-wave filter
 Summary | Full Text:PDF

A Signal-to-Noise Enhancer with Extended Bandwidth Using Two MSSW Filters and Two 90Hybrids
Youhei ISHIKAWA Toshihiro NOMOTO Takekazu OKADA Satoru SHINMURA Fumio KANAYA Shinichiro ICHIGUCHI Toshihito UMEGAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/08/25
Vol. E78-C  No. 8  pp. 1026-1032
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
enhancerMSSWhybriddirect broadcasting satellite receptionsignal-to-noise ratiocarrier-to-noise ratio
 Summary | Full Text:PDF

Noise Temperature of Active Feedback Resonator (AFR)
Youhei ISHIKAWA Sadao YAMASHITA Seiji HIDAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1993/06/25
Vol. E76-C  No. 6  pp. 925-931
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology for Advanced Functions and Size-Reductions)
Category: 
Keyword: 
active feedback resonatorAFRmicrowave resonatorunloaded Qthermal noisenoise temperature
 Summary | Full Text:PDF

Miniaturized Duplexer Using Rectangular Coaxial Dielectric Resonators for Cellular Portable Telephone
Haruo MATSUMOTO Tadahiro YORITA Youhei ISHIKAWA Toshio NISHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/05/25
Vol. E74-C  No. 5  pp. 1214-1220
Type of Manuscript:  Special Section PAPER (Special Issue on the 3rd Asia-Pacific Microwave Conference)
Category: Passive Components
Keyword: 
 Summary | Full Text:PDF

A Miniature Isolator for 800 MHz Band Mobile Communication Systems
Youhei ISHIKAWA Takekazu OKADA Takashi KAWANAMI Keiji OKAMURA Toshio NISHIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/05/25
Vol. E74-C  No. 5  pp. 1226-1232
Type of Manuscript:  Special Section PAPER (Special Issue on the 3rd Asia-Pacific Microwave Conference)
Category: Passive Components
Keyword: 
 Summary | Full Text:PDF