Radio frequency transmission control apparatus for preventing oscillation in wideband wireless local loop terminal

A radio frequency transmission control apparatus for preventing an oscillation in a wideband wireless local loop (W-WLL) terminal, wherein said apparatus comprising a radio frequency receiving unit for demodulating an WLL radio frequency band signal received via an antenna to a baseband signal so as to be processed in a modem;

• a radio frequency transmitting unit for modulating said baseband signal to a WLL radio frequency band signal and transmitting the modulated signal via an antenna;
• a local clock generating unit for generating a local clock to be used in said radio frequency receiving unit and radio frequency transmitting unit;
• and a BBM (baseband module) interface unit for matching among said BBM for performing a baseband signal processing in said W-WLL terminal, said radio frequency receiving unit and said radio frequency transmitting unit,
• wherein said apparatus comprising a BBM interface unit for transmitting a power control signal for a radio frequency converting unit and a power control signal for a power amplifier unit, both signals transmitted from said BBM, so that a power supply to said radio frequency transmitting unit is controlled, dividing said radio frequency transmitting unit into said radio frequency converting unit and said power amplifier unit in accordance with characteristics of active elements constituting said radio frequency transmitting unit;
• and
• a power switch unit for preventing an oscillation by supplying or cutting off a power, dividing said radio frequency transmitting unit into said radio frequency converting unit and said power amplifier unit, in accordance with said power control signal for said radio frequency converting unit and said power control signal for said power amplifier unit, both signals transmitted from said BBM interface unit.