Microwave antennas having both wide elevation beamwidth and a wide azimuth beamwidth over a wide frequency bandwidth
First Claim
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1. A microwave antenna having a beamwidth and a bandwidth over a range of operating frequencies, comprising:
- a horn radiator including a tubular radiating end portion having a longitudinal axis, and means for maximizing the beamwidth, including at least four open-ended cut-outs formed in said tubular radiating end portion, said cut-outs extending along the axis no more than about one-half wavelength at the highest operating frequency in said range.
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Abstract
A microwave horn antenna comprising a hollow cylindrical horn (11) having a rear section of tapered internal dimension extending towards a tubular radiation open end. The open end incorporates a number of parallel-sided slots (17), which extend at angles of 45 degrees to the horn axis. The slots (17) terminate at the open end in semi-circular cut-out portions (17B). A dielectric lens (19) is fitted over the open end of the horn. The antenna provides a wide beamwidth of approximately 90 degrees over a frequency ban of 8 to 18 GHz.
32 Citations
16 Claims
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1. A microwave antenna having a beamwidth and a bandwidth over a range of operating frequencies, comprising:
- a horn radiator including a tubular radiating end portion having a longitudinal axis, and means for maximizing the beamwidth, including at least four open-ended cut-outs formed in said tubular radiating end portion, said cut-outs extending along the axis no more than about one-half wavelength at the highest operating frequency in said range.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
Specification