Compact diversity antenna system
First Claim
Patent Images
1. A multiple antenna system comprising:
- a) a first antenna having two radiating bodies;
b) a second antenna; and
c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured, at least in part due to placement thereof, to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern.
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Abstract
The present invention provides a compact antenna system having multiple antennas exhibiting polarization and pattern diversity. The system comprises at least two antennas which may have different polarizations, operatively coupled to a passive element which operates as a Balun for a first antenna and which is configured to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern. The present invention also provides for additional antennas operatively coupled to the passive element or to the first antenna to provide additional diversity.
57 Citations
25 Claims
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1. A multiple antenna system comprising:
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a) a first antenna having two radiating bodies; b) a second antenna; and c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured, at least in part due to placement thereof, to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multiple antenna system comprising:
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a) a first antenna having two radiating bodies; b) a second antenna; c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern; and d) a first switch operatively coupled to the first antenna, and a second switch operatively coupled to the second antenna, the first switch and the second switch independently operable, wherein the first switch disables or enables operation of the first antenna and the second switch disables or enables operation of the second antenna. - View Dependent Claims (17, 18, 19)
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20. A multiple antenna system comprising:
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a) a first antenna having two radiating bodies; b) a second antenna; and c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern, wherein the first antenna has a first polarization and the second antenna has a second polarization, the first polarization being substantially different from the second polarization.
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21. A multiple antenna system comprising:
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a) a first antenna having two radiating bodies; b) a second antenna; and c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern, wherein the second antenna is a monopole antenna situated with respect to a ground plane to produce a desired radiation pattern. - View Dependent Claims (22, 23)
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24. A multiple antenna system comprising:
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a) a first antenna having two radiating bodies; b) a second antenna; and c) a passive element operatively coupled to the first antenna, the passive element configured as a Balun for the first antenna, the passive element configured to absorb and re-radiate electromagnetic radiation from the second antenna to produce a desired radiation pattern; and d) an impedance matching structure having a capacitance and an inductance, the impedance matching structure configured to provide impedance matching between the second antenna and a transmission line operatively coupled thereto. - View Dependent Claims (25)
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Specification