Apparatus and method for minimizing amplifier oscillation in an antenna system
First Claim
1. An antenna device for preventing oscillation of an amplifier, wherein the amplifier is electrically connected to a first antenna and a second antenna, the antenna device comprising:
- the amplifier, the amplifier being configured to generate a first amplifier output directed to the second antenna and a second amplifier output directed to the first antenna;
a coupling simulator configured to generate;
a first coupling simulator output that varies from the first amplifier output based on a pre-determined phase effect value and a pre-determined attenuation effect value, wherein the first coupling simulator output is received by the first antenna; and
a second coupling simulator output that varies from the second amplifier output based on the pre-determined phase effect value and the pre-determined attenuation effect value, wherein the second coupling simulator output is received by the second antenna;
anda first combining device configured to generate a first amplifier input based on the first coupling simulator output;
wherein the pre-determined phase effect value and the pre-determined attenuation effect value are assigned based on system parameters between the first antenna and the second antenna so as to prevent oscillation of the amplifier.
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Accused Products
Abstract
Embodiments of an apparatus for minimizing oscillation of an amplifier in an antenna system are provided. These embodiments can comprise passive circuitry in the form of a coupling simulator that includes passive elements selected and combined to generate an output with properties that can cancel or substantially reduce a coupled input as between two antennas in the antenna system. In one example, the coupling simulator may include a phase-shifting device and an attenuating device, each of which have properties with values selected based on parameters that result from the relationship between the antennas of the antenna system.
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Citations
20 Claims
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1. An antenna device for preventing oscillation of an amplifier, wherein the amplifier is electrically connected to a first antenna and a second antenna, the antenna device comprising:
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the amplifier, the amplifier being configured to generate a first amplifier output directed to the second antenna and a second amplifier output directed to the first antenna; a coupling simulator configured to generate; a first coupling simulator output that varies from the first amplifier output based on a pre-determined phase effect value and a pre-determined attenuation effect value, wherein the first coupling simulator output is received by the first antenna; and a second coupling simulator output that varies from the second amplifier output based on the pre-determined phase effect value and the pre-determined attenuation effect value, wherein the second coupling simulator output is received by the second antenna; and a first combining device configured to generate a first amplifier input based on the first coupling simulator output; wherein the pre-determined phase effect value and the pre-determined attenuation effect value are assigned based on system parameters between the first antenna and the second antenna so as to prevent oscillation of the amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for preventing oscillation of an amplifier in an antenna system wherein the antenna system comprises a first antenna and a second antenna, the method comprising the steps of:
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generating a first amplifier output with the amplifier; generating a second amplifier output with the amplifier; attenuating the first amplifier output by a predetermined attenuating effect value, wherein the predetermined attenuating effect value is assigned based on system parameters between the first antenna and the second antenna so as to prevent oscillation of the amplifier; phase-shifting the attenuated first amplifier output by a predetermined phase effect value, wherein the predetermined phase effect value is assigned based on the system parameters between the first antenna and the second antenna so as to prevent oscillation of the amplifier; and combining the phase-shifted attenuated first amplifier output with an input from the first antenna. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for preventing oscillation of an amplifier, wherein the amplifier is electrically connected to both a first antenna and a second antenna, the method comprising the steps of:
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generating a first amplifier output to the second antenna; generating a second amplifier output to the first antenna; generating a first coupling simulator output that varies from the first amplifier outputs based on a predetermined phase effect value and a predetermined attenuation effect value; and generating an amplifier input based on the first coupling simulator output; wherein the predetermined phase effect value and the predetermined attenuation effect value are assigned based on system parameters between the first antenna and the second antenna so as to prevent oscillation of the amplifier. - View Dependent Claims (17, 18, 19, 20)
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Specification