Microrectangular‐coaxial phase shifter for microwave devices. Issue 6 (29th January 2015)

• Record Type: Journal Article
• Authors: Sholiyi, Olusegun; Williams, John D.
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 25:Issue 6(2015)
• Page Start: 502
• Page End: 509
• Publication Date: 2015-01-29
• Subjects: Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.20885
• Languages: English
• ISSNs: 1096-4290

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>This article reports the simulated performance of rectangular coaxial ferrite phase shifter at Ka‐band. The proposed technique exploits rectangular coaxial waveguide with a symmetrically placed inner signal conductor inside an outer conductor connected to the ground. Strontium ferrite‐SU8 composite is used as an anisotropic material of choice in the modeled design. Two model phase shifting structures were designed for reciprocal and nonreciprocal applications using High Frequency Structure Simulator, HFSS. The reciprocal model produced a tunable phase shift of almost <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj22d8fj6g" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math display="inline" altimg="urn:x-wiley:10964290:media:mmce20885:mmce20885-math-0002" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mn>60</mml:mn></mml:mrow><mml:mo>°</mml:mo></mml:msup><mml:mo>/</mml:mo><mml:mi mathvariant="bold">c</mml:mi><mml:mi mathvariant="bold">m</mml:mi></mml:mrow></mml:math></alternatives></inline-formula> across 0 to 400 kA/m applied field and at 1800 Gauss. The predicted simulated performance of the nonreciprocal phase shifter was <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj22d8fj8k" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math display="inline" altimg="urn:x-wiley:10964290:media:mmce20885:mmce20885-math-0003" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mn>20</mml:mn></mml:mrow><mml:mo>°</mml:mo></mml:msup><mml:mo>/</mml:mo><mml:mi mathvariant="bold">c</mml:mi><mml:mi mathvariant="bold">m</mml:mi></mml:mrow></mml:math></alternatives></inline-formula> from a reference phase of <inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgj22d8fjc7" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math display="inline" altimg="urn:x-wiley:10964290:media:mmce20885:mmce20885-math-0004" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mn>24</mml:mn></mml:mrow><mml:mo>°</mml:mo></mml:msup></mml:mrow></mml:math></alternatives></inline-formula> at 0 A/m at the same saturation magnetization. A return loss better than 20 dB and an insertion loss less than 1.5 dB were predicted for the two models. © 2015 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:502–509, 2015.</p> </abstract>