Product features: The design of the folding oscillator, eleven unit and V reflector has a strong directional, wide frequency band, high gain, and good flatness The printing plate impedance matching device can effectively receive and transmit digital TV signals It is convenient for users to install and use the cylindrical support rod in different diameter It is compatible with dvb-t/H, dvb-t2, DMB- T/H, isdb-t, atsc-t, ADTB-T and other digital TV formats Signal output interface: English F female head Signal receiving parameters: Frequency range: 470 MHz -806MHz 10-12dB Output impedance: 75 Ω The standing wave ratio: less than or equal to 1.5 Before: it is greater than or equal to 22dB Support bar diameter: Φ 30 mm to 50 mm Interface form: English F female head Polarization mode: horizontal/vertical Working temperature: - 40 ℃ ~ 70 ℃ Relative humidity: 5%~95%1010 Air pressure: 86kPa~106kPa