Sirio Airband Base Antenna

• Type: 1/4λ ground plane
• Frequency range: tunable 108-136 MHz
• Impedance: 50Ω
• Radiation (H-plane): 360° omnidirectional
• Radiation (E-plane): beamwidth @ -3 dB = 86°
• Radiation angle: 0°
• Polarization: linear vertical
• Gain: 0 dBd, 2.15 dBi
• Bandwidth @ SWR ≤2: ≥12.2 MHz @ 108 MHz
• SWR @ res. freq.: ≤ 1.2 @ start freq.
• Max. Power (CW) @ 30°C: 500 Watts
• Connector: UHF-female

• Type: 1/4λ ground plane large band
• Frequency range: VHF AIR band, RX 108-136MHz, TX 118-136MHz @SWR ≤2
• Impedance: 50Ω
• Radiation (H-plane): 360° omnidirectional
• Radiation (E-plane): beamwidth @ -3 dB = 78°
• Radiation angle: 0°
• Polarization: linear vertical
• Gain: 0 dBd, 2.15 dBi
• Max. Power (CW) @ 30°C: 1000 Watts
• Grounding protection: All metal parts are DC-grounded, the inner conductor shows a DC short
• Connector: N-female

• Type: 3 elements yagi antenna
• Frequency range: 108-118MHz @ SWR ≤1.5, 118-137MHz @ SWR ≤2.0
• Impedance: 50Ω
• Radiation (H-plane): beamwidth @ -3 dB = 150° @ center freq.
• Radiation (E-plane): beamwidth @ -3 dB = 70° @ center freq.
• Front to back ratio: ≥ 12 dB
• Polarization: linear vertical or horizontal
• Gain: 4.85 dBd, 7 dBi
• Max. Power (CW) @ 30°C: 200 Watts
• Grounding protection: All metal parts are DC-grounded, the inner conductor shows a DC short
• Connector: N-female with rubber protection cap