Automatic Self-Powered Antenna Switch
AssigneeStartrak Information Technologies, LLC
InventorHerbert Perten
Life of this patent
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Abstract
An antenna switch is provided, comprising: an antenna cable connector that connects to a radio RF output port that both receives an RF signal at a receive frequency, and transmits an RF signal at a transmit frequency that differs from the receive frequency; an RF switch having a common contact that is switchable between a receive antenna contact and a transmit antenna contact; a level comparator comprising an input connected to the antenna cable that: when a voltage at the input is below a predefined threshold value, causes the RF switch to contact the receive antenna; and when the voltage at the input is above a predefined threshold value, causes the RF switch to contact the transmit antenna.
Claims16
An antenna switch comprising:
- an antenna cable connector that connects to a radio RF output port that both receives an RF signal at a receive frequency, and transmits an RF signal at a transmit frequency that differs from the receive frequency;
- an RF switch having a common contact that is switchable between a receive antenna contact and a transmit antenna contact;
- a level comparator comprising an input connected to the antenna cable that:
- when a voltage at the input is below a predefined threshold value, causes the RF switch to contact the receive antenna;
- and
- when the voltage at the input is above a predefined threshold value, causes the RF switch to contact the transmit antenna.
Dependencies are inferred from the claim text.