Multiple antenna multiplexers, demultiplexers and antenna assemblies
First Claim
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1. An antenna multiplexer comprising:
- a first input configured to receive a communication signal from and transmit a communication signal to a world cell antenna operable for use with AMPS/GSM850, GSM900, GSM1800, PCS/GSM1900, and UMTS/AWS communication signals;
a second input configured to receive a satellite signal from a satellite antenna;
a first notch filter coupled to the first input and configured to limit the satellite signal from passing to the world cell antenna;
a second notch filter coupled to the second input and configured to limit the received and transmitted communication signals from passing to the satellite antenna;
an output configured to output a combined signal including the communication signals and the satellite signal;
a first matching circuit configured to adjust an output impedance of the multiplexer;
a second matching circuit coupled between the second input and the second notch filter and configured to match an impedance of the satellite antenna to a filter impedance of the second notch filter; and
a third matching circuit coupled between the first notch filter and the second notch filter and configured to match a second notch filter output to a first filter output;
wherein the antenna multiplexer is operable via DC phantom power provided to the antenna multiplexer through the output.
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Abstract
Exemplary embodiments are provided of apparatus and methods relating to antenna multiplexers and demultiplexers are disclosed. In exemplary embodiments, antenna multiplexers include two or more inputs for receiving a corresponding number of signals from multiple antennas. The antennas may include world cell antennas, AM/FM antennas, SDARS antennas, GPS antennas, and/or antennas combining the preceding. Exemplary antenna multiplexers also include an output for simultaneously outputting the combined signals received by the multiplexer. Demultiplexers for receiving such combined signals and outputting each signal via a separate output are also disclosed.
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Citations
17 Claims
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1. An antenna multiplexer comprising:
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a first input configured to receive a communication signal from and transmit a communication signal to a world cell antenna operable for use with AMPS/GSM850, GSM900, GSM1800, PCS/GSM1900, and UMTS/AWS communication signals; a second input configured to receive a satellite signal from a satellite antenna; a first notch filter coupled to the first input and configured to limit the satellite signal from passing to the world cell antenna; a second notch filter coupled to the second input and configured to limit the received and transmitted communication signals from passing to the satellite antenna; an output configured to output a combined signal including the communication signals and the satellite signal; a first matching circuit configured to adjust an output impedance of the multiplexer; a second matching circuit coupled between the second input and the second notch filter and configured to match an impedance of the satellite antenna to a filter impedance of the second notch filter; and a third matching circuit coupled between the first notch filter and the second notch filter and configured to match a second notch filter output to a first filter output; wherein the antenna multiplexer is operable via DC phantom power provided to the antenna multiplexer through the output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification