Ultra-wideband low-profile circularly-polarized two-arm spiral antenna
A helical antenna and low-profile technology, applied in the field of ultra-wideband low-profile circularly polarized dual-arm helical antennas, can solve problems such as high gain and low profile, and achieve good circular polarization performance, high gain, and stable dielectric constant Effect
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[0031] The present invention will be further described in detail below with reference to the drawings and examples, but the embodiments of the present invention are not limited thereto.
[0032] The center frequency point of the dual-arm helical antenna provided in this embodiment is 21GHz, and its structure is as follows Figure 1 to Figure 5 As shown, this embodiment can achieve an impedance bandwidth of 38 GHz within a back cavity section thickness of 5.2 mm, a gain of 6 dB above 5 GHz, a gain of 8 dB above 7 GHz, a maximum gain of 11 GHz, and an axial ratio of less than 9 dB in the entire frequency band, below 20 GHz Meet less than 5dB.
[0033] An ultra-wideband low-profile circularly polarized dual-arm helical antenna provided in this embodiment includes:
[0034] Back cavity 1: its structure is as figure 1 As shown, its specific dimensions are as Figure 7 , Figure 8 As shown, the section thickness of the back cavity is 5.2mm, the outer diameter of the back cavity ...
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