Combination GPS and VHF antenna
First Claim
Patent Images
1. A multiple antenna system comprising:
- a mounting structure;
a monopole antenna mounted on said mounting structure at a first level;
a three-dimensional volute antenna mounted on said mounting structure at a second level lower than said first level of said monopole antenna, said three-dimensional volute antenna including a plurality of electrically-conductive spiral arms configured for reception of a circularly polarized signal;
wherein said monopole and three-dimensional volute antennas are operable simultaneously.
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Abstract
A combination antenna for aircraft application is disclosed. The antenna has a shell similar to that of a conventional VHF communication antenna, but it houses a monopole VHF and a volute GPS antennas. Provisions are made to enable the GPS antenna to be situated beneath the VHF antenna, but yet have full view of the upper hemisphere and avoid interference even though no structural shielding is provided. The combination antenna is mountable on the pre-existing base used for the conventional single VHF communication antenna and is operable with the pre-existing cable used to transmit the signal of the replaced single VHF communication antenna.
74 Citations
26 Claims
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1. A multiple antenna system comprising:
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a mounting structure; a monopole antenna mounted on said mounting structure at a first level; a three-dimensional volute antenna mounted on said mounting structure at a second level lower than said first level of said monopole antenna, said three-dimensional volute antenna including a plurality of electrically-conductive spiral arms configured for reception of a circularly polarized signal; wherein said monopole and three-dimensional volute antennas are operable simultaneously. - View Dependent Claims (2, 3, 4, 5)
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6. A multiple antenna system comprising:
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a mounting structure; a monopole antenna mounted on said mounting structure at a first level; a three-dimensional volute antenna mounted on said mounting structure at a second level lower than said first level of said monopole antenna; wherein said monopole and three-dimensional volute antennas are operable simultaneously; and wherein said three-dimensional volute antenna further comprises two pairs of radiating elements, and whereby one radiating element of each of said pairs of radiating elements has higher impedance than the other radiating element of the same said pair of radiating elements, thereby realizing a ninety degrees phase shift between the two radiating elements of each of said pair of radiating elements. - View Dependent Claims (7, 8, 9)
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10. A multiple antenna system comprising:
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a mounting structure; a monopole antenna mounted on said mounting structure at a first level; a three-dimensional volute antenna mounted on said mounting structure at a second level lower than said first level of said monopole antenna; a diplexer circuit; connecting means to connect said diplexer circuit to said monopole and three-dimensional volute antennas; a single output-input connector connected to said diplexer circuit and configured to transmit the signals of said monopole and three-dimensional volute antennas into a single communication cable; and
,wherein said monopole antenna and said three-dimensional volute antenna are operable simultaneously. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A multiple antenna system comprising:
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a mounting structure; a monopole antenna mounted on said mounting structure at a first level; a cylindrical volute antenna mounted on said mounting structure at a second level lower than the first level of said monopole antenna, said cylindrical volute antenna having a cylindrical core portion and two pairs of spiral radiating elements rotating one half a revolution while spanning the length of said volute antenna; a diplexer circuit; connecting means to connect said diplexer circuit to said monopole and cylindrical volute antennas; a single output-input connector connected to said diplexer circuit and configured to transmit the signals of said monopole and cylindrical volute antennas into a single communication cable; and
,wherein said monopole and cylindrical volute antennas are operable simultaneously, and said cylindrical volute antenna is capable of an unobstructed hemispherical reception. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A multiple antenna system comprising:
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a mounting structure; a monopole antenna mounted on said mounting structure at a first level; a circularly polarized three dimensional antenna mounted on said mounting structure at a second level lower than said first level of said monopole antenna; and choking means interposed between said monopole antenna and said circularly polarized antenna for enabling simultaneous reception of linearly polarized signals by said monopole antenna and circularly polarized signals by said circularly polarized antenna. - View Dependent Claims (24, 25, 26)
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Specification