Vehicular traffic sensor
First Claim
1. A sensor for monitoring vehicles on a roadway, the sensor comprising:
- a transmit portion comprising;
a digital signal generator for digitally generating a modulated signal for transmission; and
a transmit antenna for transmitting the modulated signal towards vehicles on a roadway;
a received portion comprising;
a receive antenna for receiving reflections of the modulated signal from vehicles on the roadway, wherein the reflections of the modulated signal are processed to produce traffic data representing the vehicles on the roadway;
wherein the transmit antenna and the receive antenna comprise a single antenna used to transmit the modulated signal and to receive the reflections of the modulated signal, respectively.
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0 Petitions
Accused Products
Abstract
A vehicle traffic sensor for detecting and monitoring vehicular targets is presented. The sensor employs a planar design resulting in a reduced profile sensor. The sensor includes a multi-layer radio frequency board with RF components on one of the sides and both isolation and planar array antennas on the opposing side. The antennas are preferably tapered planar array antennas which include one transmit antenna and one receive antenna. The sensor also includes at least one logic or signal processing board populated with components on a first side and a ground plane on a second side positioned toward the RF componentry of the RF board to form an RF shield. The boards are housed within a housing that is permeable, at least on the side through which the antenna structures propagate.
107 Citations
20 Claims
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1. A sensor for monitoring vehicles on a roadway, the sensor comprising:
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a transmit portion comprising; a digital signal generator for digitally generating a modulated signal for transmission; and a transmit antenna for transmitting the modulated signal towards vehicles on a roadway; a received portion comprising; a receive antenna for receiving reflections of the modulated signal from vehicles on the roadway, wherein the reflections of the modulated signal are processed to produce traffic data representing the vehicles on the roadway; wherein the transmit antenna and the receive antenna comprise a single antenna used to transmit the modulated signal and to receive the reflections of the modulated signal, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A sensor for monitoring vehicles on a roadway, the sensor comprising:
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a transmit portion comprising; a digital signal generator for digitally generating a modulated signal; and a transmit antenna for transmitting the modulated signal towards vehicles on a roadway; a receiving portion comprising; a receive antenna for receiving reflections of the modulated signal from vehicles on the roadway, wherein the reflections of the modulated signal are processed to produce traffic data representing the vehicles on the roadway; wherein the transmit antenna and the receive antenna comprise a single antenna used to transmit the modulated signal, respectively, and to receive the reflections of the modulated signal and wherein the transmit antenna is a first array of series fed coplanar loop elements and the receive antenna is a second array of series fed coplanar loop elements. - View Dependent Claims (10, 11)
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12. A sensor for monitoring vehicles on a roadway, the sensor comprising:
a transmit portion comprising; a digital signal generator that digitally generates a modulated signal for transmission; and an antenna for transmitting the modulated signal towards vehicles on a roadway and receiving reflections of the modulated signal from vehicles on the roadway, wherein the reflections of the modulated signal are processed to produce traffic data representing the vehicles on the roadway and wherein said antenna is used to transmit the modulated signal and to receive the reflections of the modulated signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification