The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2001
Filed:
Jan. 15, 1999
Imran A. Jamali, Chandler, AZ (US);
Rami H. Khatib, Huntington Beach, CA (US);
Other;
Abstract
A radio for a half-duplex communication system includes a warning circuit for indicating when a transmission of a signal is taking place. The radio includes a transceiver for providing a voice signal, and the warning circuit includes a pulse generator for providing a beacon signal. The voice signal and the beacon signal are combined into a transmitted signal. The warning circuit includes a power splitter for receiving a remote signal from an antenna and for dividing the remote signal into the voice and beacon signals thereof. The power splitter then provides the voice signal to the transceiver. A comparator compares a level of the received beacon signal with a reference and provides an output to an indicator (such as an LED) when the level of the beacon signal is greater than the reference. As such, the indicator illuminates in the presence of a beacon signal. A preferred implementation of the radio is in an air-traffic environment, with each aircraft and a control tower initiating and receiving transmission therewith.