Abstract: A combined proximity monitoring and locating system including a wearable unit, a proximity detector, and a control subsystem. The proximity detector includes a receiver for receiving the wearable unit transmitter signal, a processing subsystem configured to signal an alert if the wearable unit transmitter signal strength is below a pre-established minimum, and a tracking subsystem configured to assist in locating the wearable unit based on the signal strength of the wearable unit transmitter signal. A control subsystem is responsive to an indication that the alert has been signaled. The control subsystem includes an RF transmitter configured to transmit a transponder activation signal, and an RF antenna network for relaying the transponder activation signal to a receiver of the portable unit to activate the transponder thereof. A tracking unit includes a receiver configured to receive the transponder signal of the wearable unit to locate the wearable unit.

Abstract: A combined proximity monitoring and locating system including a wearable unit, a proximity detector, and a control subsystem. The proximity detector includes a receiver for receiving the wearable unit transmitter signal, a processing subsystem configured to signal an alert if the wearable unit transmitter signal strength is below a pre-established minimum, and a tracking subsystem configured to assist in locating the wearable unit based on the signal strength of the wearable unit transmitter signal. A control subsystem is responsive to an indication that the alert has been signaled. The control subsystem includes an RF transmitter configured to transmit a transponder activation signal, and an RF antenna network for relaying the transponder activation signal to a receiver of the portable unit to activate the transponder thereof. A tracking unit includes a receiver configured to receive the transponder signal of the wearable unit to locate the wearable unit.

Abstract: A communication system. The communication system communicates to a number of subscribers. The communication system includes a number of communication circuits which are disposed to divide a region into communication areas. Each communication circuit communicates using a first polarization in a first portion of its communication area and communicates using a second, different polarization in a second portion of its communication area. Additionally, adjacent portions of the communication areas of the communication circuits use the same polarization.

Abstract: A communication system. The communication system communicates to a number of subscribers. The communication system includes a number of communication circuits which are disposed to divide a region into communication areas. Each communication circuit communicates using a first polarization in a first portion of its communication area and communicates using a second, different polarization in a second portion of its communication area. Additionally, adjacent portions of the communication areas of the communication circuits use the same polarization.