Apparatus comprising a broadcast receiver circuit and provided with an antenna
First Claim
1. An apparatus comprisinga broadcast receiver circuit,an embedded antenna configured and arranged for receiving broadcast signals in a broadcast band of interest, the embedded antenna being less than one tenth of the wavelength corresponding to a center frequency of the broadcast band of interest and for presenting a primarily reactive impedance, anda tuning circuit coupled between the antenna and the broadcast receiver circuit, which tuning circuit includes a filter circuit coupled to ground, wherein the filter circuit includes primarily reactive impedance of the embedded antenna and the tuning circuit is configured and arranged to have a first resonance at a first frequency below a lower cutoff frequency for the broadcast band of interest, and a second resonance at a second frequency above an upper cutoff frequency of the broadcast band and wherein the tuning circuit comprises an amplifier with an output to the receiver circuit and with an input to the filter circuit, and wherein the tuning circuit is configured to provide a carrier to noise ratio (CNR) which is substantially flat across the broadcast band.
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Accused Products
Abstract
The invention relates to an apparatus 1 comprising a broadcast receiver circuit, an embedded antenna for receiving broadcast signals and a tuning circuit coupled between the antenna and the receiver circuit, which tuning circuit comprises a filter circuit coupled to ground, wherein the tuning circuit is designed to have a first resonance at a first frequency below a broadcast band of interest, and a second resonance at a second frequency above the broadcast band and wherein the tuning circuit comprises an amplifier with an output to the receiver circuit and with an input to the filter circuit, and wherein the tuning circuit is provided with a carrier to noise ratio (CNR) which is substantially flat across the broadcast band.
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Citations
19 Claims
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1. An apparatus comprising
a broadcast receiver circuit, an embedded antenna configured and arranged for receiving broadcast signals in a broadcast band of interest, the embedded antenna being less than one tenth of the wavelength corresponding to a center frequency of the broadcast band of interest and for presenting a primarily reactive impedance, and a tuning circuit coupled between the antenna and the broadcast receiver circuit, which tuning circuit includes a filter circuit coupled to ground, wherein the filter circuit includes primarily reactive impedance of the embedded antenna and the tuning circuit is configured and arranged to have a first resonance at a first frequency below a lower cutoff frequency for the broadcast band of interest, and a second resonance at a second frequency above an upper cutoff frequency of the broadcast band and wherein the tuning circuit comprises an amplifier with an output to the receiver circuit and with an input to the filter circuit, and wherein the tuning circuit is configured to provide a carrier to noise ratio (CNR) which is substantially flat across the broadcast band.
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17. A method comprising:
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switching an apparatus to a receive mode that filters broadcast signals from being received by a transmit circuit of the apparatus; receiving broadcast signals in a broadcast band of interest at an embedded antenna, the embedded antenna being less than one tenth of the wavelength corresponding to a center frequency of the broadcast band of interest and for presenting a primarily reactive impedance; filtering, using a filter circuit of a tuning circuit, wherein the filter circuit includes the primarily reactive impedance of the embedded antenna and the filter circuit coupled to ground and to the transmit circuit; receiving the broadcast signals from the antenna at the tuning circuit that includes an amplifier and having a first resonance at a first frequency below a lower cutoff frequency for a broadcast band of interest, and a second resonance at a second frequency above an upper cutoff frequency of the broadcast band; and providing, to a receiver circuit and from the tuning circuit, the broadcast signals having a carrier to noise ratio (CNR) which is substantially flat across the broadcast band. - View Dependent Claims (18, 19)
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Specification