Average power capacity of rotary-field ferrite phase shifters

Hord, W.E.

doi:10.1109/22.179906

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…The rf thermal calculations use analytical results previously published by Hord [3]. The concerns at high incident rf power are (i) to limit the temperature rise within the rod so that the fer rite material will not lose too much magnetic activity, and (ii) to limit the maximum temperature gradient to a safe value so that stresses created will not cause fracture of the rod material.…”

Section: Rf Thermal Calculationsmentioning

confidence: 99%

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L-band high power electronically rotatable ferrite half-wave plate

Boyd¹,

Hord²,

McKechnie³

2010

2010 IEEE MTT-S International Microwave Symposium

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Rotatable ferrite half-wave plates allow efficient selection of any desired amount of reciprocal vector rotation when excited by a linearly polarized wave, or any desired amount of re ciprocal phase change with circularly polarized excitation. Ability to handle high peak power levels requires careful selection of the ferrite material properties, and high average power handling can be promoted by incorporating heat sinking into the structure. This paper describes the design approach and characteristics of an air-cooled ferrite half-wave plate operating in the vicinity of 1.3 GHz. frequency at a peak power level of 65 kW. and an av erage power level of 6,500 W. Measured data are presented for an engineering model unit with 0.4 dB. maximum insertion loss, capable of switching between any two states in approximately 500 microseconds.Index Terms -Polarization, birefringence, waveguide compo nents, microwave phase shifters, ferrimagnetic materials, ferrite devices.978-1-4244-7732-6/101$26.00 ©201 0 IEEE 1344

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Section: Rf Thermal Calculationsmentioning

confidence: 99%

“…Ceramic disks are used to reduce the size of the structure [2] or to provide heat sinking of the magnetic loss es in the ferrite [3] allowing operation at higher power levels.…”

Section: Introductionmentioning

confidence: 99%

L-band high power electronically rotatable ferrite half-wave plate

Boyd¹,

Hord²,

McKechnie³

2010

2010 IEEE MTT-S International Microwave Symposium

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Temperature characteristic analysis of a ferrite phase shifter in a grooved waveguide

Che

Wang

2001

Micro & Optical Tech Letters

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A rigorous analysis of the temperature characteristics of a ferrite phase shifter in a grooved waveguide is carried out by using a combination of analytical and numerical methods. The numerical results are found to be in agreement with our measurements. The results obtained provide valuable guidance for the simulation of the property of the device in the high‐power case and for the optimization of the design of the device. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 156–159, 2001.

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