Gain and bandwidth enhancement of ferrite-loaded CBS antenna using material shaping and positioning

Mikal Askarian Amiri; Constantine Balanis; Craig R. Birtcher

doi:10.1109/LAWP.2013.2260519

Gain and bandwidth enhancement of ferrite-loaded CBS antenna using material shaping and positioning

Mikal Askarian Amiri, Constantine Balanis, Craig R. Birtcher

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Loading a cavity-backed slot (CBS) antenna with ferrite material and applying a biasing static magnetic field can be used to control its resonant frequency. Such a mechanism results in a frequency-reconfigurable antenna. However, placing a lossy ferrite material inside the cavity reduces the gain and impacts the impedance bandwidth. This letter develops guidelines, based on a nonuniform applied magnetic field and nonuniform magnetic field internal to the ferrite specimen, for the design of ferrite-loaded CBS that enhance its gain and tunable bandwidth by shaping the ferrite specimen and judiciously locating it within the cavity. To validate the modeling, simulations were performed using ANSYS's Maxwell 3D and HFSS, and they were compared to measurements conducted in the Arizona State University (ASU) anechoic chamber.

Original language	English (US)
Article number	6511976
Pages (from-to)	611-614
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	12
DOIs	https://doi.org/10.1109/LAWP.2013.2260519
State	Published - 2013

Keywords

Cavity-backed
ferrite
gain
impedance match
tunable bandwidth

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/LAWP.2013.2260519

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title = "Gain and bandwidth enhancement of ferrite-loaded CBS antenna using material shaping and positioning",

abstract = "Loading a cavity-backed slot (CBS) antenna with ferrite material and applying a biasing static magnetic field can be used to control its resonant frequency. Such a mechanism results in a frequency-reconfigurable antenna. However, placing a lossy ferrite material inside the cavity reduces the gain and impacts the impedance bandwidth. This letter develops guidelines, based on a nonuniform applied magnetic field and nonuniform magnetic field internal to the ferrite specimen, for the design of ferrite-loaded CBS that enhance its gain and tunable bandwidth by shaping the ferrite specimen and judiciously locating it within the cavity. To validate the modeling, simulations were performed using ANSYS's Maxwell 3D and HFSS, and they were compared to measurements conducted in the Arizona State University (ASU) anechoic chamber.",

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AU - Amiri, Mikal Askarian

AU - Balanis, Constantine

AU - Birtcher, Craig R.

PY - 2013

Y1 - 2013

N2 - Loading a cavity-backed slot (CBS) antenna with ferrite material and applying a biasing static magnetic field can be used to control its resonant frequency. Such a mechanism results in a frequency-reconfigurable antenna. However, placing a lossy ferrite material inside the cavity reduces the gain and impacts the impedance bandwidth. This letter develops guidelines, based on a nonuniform applied magnetic field and nonuniform magnetic field internal to the ferrite specimen, for the design of ferrite-loaded CBS that enhance its gain and tunable bandwidth by shaping the ferrite specimen and judiciously locating it within the cavity. To validate the modeling, simulations were performed using ANSYS's Maxwell 3D and HFSS, and they were compared to measurements conducted in the Arizona State University (ASU) anechoic chamber.

AB - Loading a cavity-backed slot (CBS) antenna with ferrite material and applying a biasing static magnetic field can be used to control its resonant frequency. Such a mechanism results in a frequency-reconfigurable antenna. However, placing a lossy ferrite material inside the cavity reduces the gain and impacts the impedance bandwidth. This letter develops guidelines, based on a nonuniform applied magnetic field and nonuniform magnetic field internal to the ferrite specimen, for the design of ferrite-loaded CBS that enhance its gain and tunable bandwidth by shaping the ferrite specimen and judiciously locating it within the cavity. To validate the modeling, simulations were performed using ANSYS's Maxwell 3D and HFSS, and they were compared to measurements conducted in the Arizona State University (ASU) anechoic chamber.

KW - Cavity-backed

KW - ferrite

KW - gain

KW - impedance match

KW - tunable bandwidth

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Gain and bandwidth enhancement of ferrite-loaded CBS antenna using material shaping and positioning

Abstract

Keywords

ASJC Scopus subject areas

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