Method and apparatus for wirelessly coupling a source signal to a radio frequency receiver
First Claim
1. A digital audio system, comprising:
- a receiver coupled to a radio frequency modulator;
a source signal modulated by the radio frequency modulator to provide a modulated signal;
an external antenna for receiving the source signal and for transmitting the modulated signal; and
a series of attenuators and low pass filters coupled to the radio frequency modulator and a splitter for splitting the modulated signal between a first path toward the external antenna and a second path toward an internal antenna coupled to the radio frequency modulator.
12 Assignments
0 Petitions
Accused Products
Abstract
A digital audio system (20) can include a receiver (24) coupled to an RF modulator (30), a source signal modulated by the RF modulator to provide a modulated signal, and an external antenna (32) for receiving the source signal and for transmitting the modulated signal. The receiver can be a satellite radio receiver or any digital source such as an FM radio or MP3 player for example. The system can further include a coupling network (26) coupled between the receiver and the external antenna and between the RF modulator and the external antenna. The system can further include an internal antenna (34) coupled to the RF modulator for radiating the modulated signal via a second path. The digital audio system can be a satellite digital audio radio system for a vehicle 31 with the external antenna placed outside the vehicle and the internal antenna placed inside the vehicle.
-
Citations
18 Claims
-
1. A digital audio system, comprising:
-
a receiver coupled to a radio frequency modulator; a source signal modulated by the radio frequency modulator to provide a modulated signal; an external antenna for receiving the source signal and for transmitting the modulated signal; and a series of attenuators and low pass filters coupled to the radio frequency modulator and a splitter for splitting the modulated signal between a first path toward the external antenna and a second path toward an internal antenna coupled to the radio frequency modulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A satellite digital audio radio system, comprising:
-
a satellite receiver coupled to a radio frequency modulator; an external antenna for receiving a satellite source signal and for transmitting a modulated signal; a coupling network coupled between the satellite receiver and the external antenna and between the radio frequency modulator and the external antenna; and a series of attenuators and low pass filters coupled to the radio frequency modulator and a splitter for splitting the modulated signal between a first path toward the external antenna end a second path toward an internal antenna coupled to the radio frequency modulator. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A method of wirelessly coupling a source signal to a radio frequency receiver in a vehicle, comprising the steps of:
-
modulating the source signal to provide a modulated signal; attenuating the modulated signal using a series of attenuators coupled to a radio frequency modulator providing the modulated signal; low pass filtering using a series of low pass filters coupled to the radio frequency modulator; and splitting using a splitter for spitting the modulated signal between a first path toward an external radiating element and a second path toward an internal radiating element. - View Dependent Claims (16, 17, 18)
-
Specification