Antenna system of a radio communication terminal
AssigneeLG Electronics Inc.
InventorTae-Kyu Choi
Life of this patent
Estimating the term…
Abstract
An antenna system of a radio communication terminal includes: a directional antenna for transmitting and receiving an RF signal to and from a base station through a radio link; and an amplifying unit integrated on one board together with the directional antenna and amplifying and filtering the RF signal. A transmistivity of a radio communication terminal is improved, a loss according to a transmission path between an antenna and the radio communication terminal can be compensated, and a speech quality can be maintained by above a certain level even in an area remote from a base station.
Claims15
An antenna system of a radio communication terminal comprising:
- an antenna that transmits and receives a communication signal to and from a communication node;
- a sending end amplifying/filtering unit that amplifies and filters the communication signal to be transmitted through a duplexer;
- a receiving end amplifying/filtering unit that amplifies and filters the communication signal received through a duplexer;
- a closed loop control circuit that generates a control signal according to power of a communication signal output from sending end amplifying/filtering unit;
- and
- a bias unit that separated the communication signal and a power transmitted from a radio communication terminal through a transmission line,
- wherein the receiving end amplifying/filtering unit includes a variable amplifier that amplifies a reception communication signal as much as a variable gain according to a control signal, and
- wherein the closed loop control circuit comprises:
- a coupling unit that branches a transmission output from a final end of the sending end amplifying/filtering unit;
- and
- a detection controller that generates a control signal according to a strength of power of the branched transmission output and applying the control signal to the variable gain amplifier.
An antenna system of a radio communication terminal comprising:
- an antenna that transmits and receives a communication signal to and from a communication node;
- a sending end amplifying/filtering unit that amplifies and filters a transmission signal;
- a receiving end amplifying/filtering unit that amplifies and filters a reception signal;
- and
- a bias unit that separates a communication signal, a power and a control signal transmitted from the radio communication terminal through a transmission line,
- wherein the control signal is applied to at least one of the sending and receiving end amplifying/filtering units to adjust a corresponding amplifier gain.
A radio communication method comprising:
- transmitting and receiving a communication signal in an antenna to and from a communication node;
- amplifying and filtering a communication signal in a sending end amplifying/filtering unit to be transmitted through a duplexer;
- amplifying and filtering the communication signals in a receiving end amplifying filtering unit through the duplexer;
- generating a control signal according to power of a transmission communication signal outputted from the sending end amplifying/filtering unit;
- and
- separating the communication signal and a power transmitted from a radio communication terminal through a transmission line,
- wherein generating the control signal comprises:
- branching a transmission output form a final end of the sending end amplifying/filtering unit;
- and
- generating the control signal according to a strength of power of the branched transmission output and variably controlling a gain of the receiving end amplifying/filtering unit based on the generated control signal.
Dependencies are inferred from the claim text.