Method and apparatus for improving the isolation characteristics of HD radio combiners
First Claim
1. A method for improving transmitter isolation in a radio signal transmission system comprising a combiner for combining digital and analog radio signals, a digital radio signal transmitter coupled to said combiner, an analog radio signal transmitter coupled to said combiner, an antenna coupled to said combiner, and a reject load coupled to said combiner, said method comprising the steps of:
- a. coupling an impedance matching device between said reject load and said combiner; and
b. adjusting said impedance matching device to reduce the energy transmitted from said digital signal transmitter to said analog signal transmitter through said combiner.
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Accused Products
Abstract
A method and system are provided for improving the isolation characteristics of a combiner. In a system comprising a digital and analog radio signal combiner and a digital transmitter, an analog transmitter, an antenna, and a reject load coupled to the combiner, adjusting an impedance matching device coupled between the reject load and combiner so as to reduce the energy transmitted from the digital transmitter to the analog transmitter through the combiner.
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Citations
21 Claims
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1. A method for improving transmitter isolation in a radio signal transmission system comprising a combiner for combining digital and analog radio signals, a digital radio signal transmitter coupled to said combiner, an analog radio signal transmitter coupled to said combiner, an antenna coupled to said combiner, and a reject load coupled to said combiner, said method comprising the steps of:
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a. coupling an impedance matching device between said reject load and said combiner; and b. adjusting said impedance matching device to reduce the energy transmitted from said digital signal transmitter to said analog signal transmitter through said combiner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising the steps of:
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a. transmitting a digital radio signal from a digital transmitter to a combiner for combining digital and analog radio signals; b. transmitting an analog radio signal from an analog transmitter to said combiner; c. dissipating part of said digital radio signal and part of said analog signal to a reject load coupled to said combiner through an impedance matching device; and d. adjusting said impedance matching device so as to reduce the energy transmitted from said digital transmitter to said analog transmitter through said combiner. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system comprising:
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a. a combiner for combining digital and analog radio signals; b. a digital transmitter coupled to said combiner; c. an analog transmitter coupled to said combiner; d. an antenna coupled to said combiner; and e. a reject load coupled to a reject load port of said combiner through an impedance matching device. - View Dependent Claims (16, 17)
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18. A system comprising:
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a. a combining means for combining digital and analog radio signals; b. a first transmitting means for transmitting a digital radio signal to said combining means; c. a second transmitting means for transmitting an analog radio signal to said combining means; d. a radiating means for radiating part of said digital and analog radio signals from said combining means; e. a dissipating means for dissipating from said combining means part of said digital and analog radio signals; and f. an adjusting means for reducing the energy transmitted from said first transmitting means to said second transmitting means through said combining means, said adjusting means coupled between said combining means and said dissipating means. - View Dependent Claims (19)
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20. A system comprising:
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a. a combiner for combining digital and analog radio signals; b. a digital transmitter coupled to said combiner; c. an analog transmitter coupled to said combiner; d, an antenna coupled to said combiner; e. a reject load coupled to said combiner through a coupler; and f. an insulator surrounding said coupler. - View Dependent Claims (21)
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Specification