A simple version of corrugated waveguide: Smooth-walled circular waveguide coated with lossy magnetic material

Lee, C.; Chuang, Shun‐Lien; Lee, S.

doi:10.1109/aps.1985.1149501

Cited by 10 publications

(2 citation statements)

References 4 publications

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“…CP is usually generated by using waveguide polarizer, which takes several forms. For instance, metallic septum in square waveguides [6,7] or circular waveguides [8,9] have been reported, and waveguide polarizers have also been proposed by adding corrugations [10], dielectric slab [11], irises [12], grooves [13] or by using lossy magnetic material [14,15]. However, these polarizers always have large dimensions or complicated physical structure.…”

Section: Introductionmentioning

confidence: 99%

Horn-Based Circular Polarized Antenna Array With a Compact Feeding for Ka-Band Monopulse Antenna

Yongli¹,

Wang

Da-cheng³

et al. 2013

PIER

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Abstract-A pyramidal horn monopulse array is proposed for working at Ka-band with circular polarization (CP) characteristic. The array is composed of 28 elements with a 28-way waveguide power divider network. The element has a pyramidal horn with a rectangular waveguide, which is placed downside the horn. There is a 45 • inclined slot cut in the wide wall of the rectangular waveguide. The inclined slot can convert the excitation into two orthogonal modes with equal amplitude, and 90 • out of phase is produced due to different propagation constants of the two modes in the pyramidal horn. Therefore, the antenna can achieve CP by using a compact structure without polarizer. This paper also provides procedure of the compact power divider network for synthesizing monopulse pattern. This monopulse array has excellent performance: The simulated and measured reflection coefficients of the sum port and difference port of the array are below −15 dB, the side lobe level of array less than −27 dB, and axial ratio < 3 dB in the mainlobe beamwidth. The simulated and measured results are in good agreement.

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Section: Introductionmentioning

confidence: 99%

Horn-Based Circular Polarized Antenna Array With a Compact Feeding for Ka-Band Monopulse Antenna

Yongli¹,

Wang

Da-cheng³

et al. 2013

PIER

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show abstract

“…Radiation patterns of the coated guide in Figure 13 (a/X = 2.02, 9 Q = 8.4°, T = 3.18 cm, e 2 = 24-J0.48, H2 = 1. In this paper, we will suggest an alternative: a regular circular waveguide horn coated with a lossy magnetic material [9], [10]. It is shown theoretically and experimentally that such a circular waveguide (approximately) satisfies the boundary condition for the "balanced hybrid" mode, and they have the same E-and H-plane radiation patterns.…”

mentioning

confidence: 99%

A simple circular-polarized antenna: circular waveguide horn coated with lossy magnetic material

Lee

Justice

1988

IEEE Trans. Antennas Propagat.

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A circular waveguide horn coated with a lossy material in its interior wall can be used as an alternative to a corrugated waveguide for radiating a circularly polarized (CP) field. To achieve good CP radiation, the diameter of the structure must be larger than the free-space wavelength, and the coating material must be sufficiently lossy and magnetic. This device is cheaper and lighter in weight than the corrugated one.

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Compact horn for Earth coverage

Kumar¹

1988

Electron. Lett.

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A simple version of corrugated waveguide: Smooth-walled circular waveguide coated with lossy magnetic material

Cited by 10 publications

References 4 publications

Horn-Based Circular Polarized Antenna Array With a Compact Feeding for Ka-Band Monopulse Antenna

Horn-Based Circular Polarized Antenna Array With a Compact Feeding for Ka-Band Monopulse Antenna

A simple circular-polarized antenna: circular waveguide horn coated with lossy magnetic material

Compact horn for Earth coverage

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