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Development of an isolator with low height

Journal of Magnetics Society of Japan Volume 29 Issue 2 Page 66-71
published_at 2005
Title
低背型アイソレータの開発
Development of an isolator with low height
Creators Yamamoto Setsuo
Creators 大城 和宣
Creators Kurisu Hiroki
Creators 松浦 満
Creators 三上 秀人
Creators 藤井 重男
Creator Keywords
isolator microstrip Y-junction YIG ferrite non-reciprocal transmission low height
An isolator with a height of 1 mm, approximately two-thirds that of the conventional isolators now on the market, was successfully developed. The isolator consists of a thin YIG ferrite platelet, a silver microstrip Y-junction as a transmission line, a ferrite permanent magnet platelet for generating a magnetic bias field, and an iron yoke as a part of a magnetic circuit. The thickness of the YIG ferrite platelet, the ferrite magnet platelet, and the iron yoke was reduced to less than 0.3 mm to achieve a total device height of 1 mm. The transmission characteristics of the isolator were analyzed, using the finite element method. The simulated transmission characteristics of the designed isolator showed non-reciprocal operation at 5 GHz with an insertion loss of 0.65 dB, and an isolation over 20 dB. A thin YIG ferrite platelet with a ferromagnetic resonance width (delta H) of 5.6 kA/m was fabricated by a novel sintering method using a pulsed current under uniaxial pressurization followed by flash annealing. The fabricated isolator successfully operated at 5 GHz with an insertion loss of 0.7 dB and an isolation of 23 dB, which are acceptable transmission characteristics for practical use.
Languages jpn
Resource Type journal article
Publishers 日本応用磁気学会
Date Issued 2005
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0285-0192
[NCID]AN0031390X
[isVersionOf] [URI]http://www.wdc-jp.com/msj/journal/index.html
Schools 大学院理工学研究科(工学)