Key Features:

1. Dual-Band Operation: The antenna is tuned for both the 144 MHz and 433 MHz amateur radio bands, allowing seamless switching between VHF and UHF frequencies.

2. Optimized Gain:

   • 144 MHz: With a maximum gain of 10.72 dB over reference, this antenna provides strong signal amplification, perfect for longer-distance communications on the VHF band.
   • 433 MHz: The antenna offers a gain of 11.14 dB, providing reliable UHF performance for various applications, including local communications and repeater work.

3. Excellent Front-to-Back Ratio:

   • 144 MHz: 23.15 dB front-to-back ratio ensures minimized interference from unwanted signals, giving you clearer reception.
   • 433 MHz: A front-to-back ratio of 16.36 dB helps reduce background noise, allowing better signal clarity in busy areas.

4. Beamwidth:

   • 144 MHz: The antenna offers a beamwidth of 51.2 degrees at -3 dB, providing a balanced directionality that covers a wide area.
   • 433 MHz: With a beamwidth of 28.2 degrees at -3 dB, the UHF band benefits from narrower, more focused coverage, ideal for directional communication.

5. Low SWR Across the Bands:

   • 144 MHz: The SWR graph shows an impressive 1.01 SWR at 144.6 MHz, which means minimal signal loss and maximum power transfer.
   • 433 MHz: The antenna has an SWR of 1.013 at 432 MHz, allowing for efficient transmission without significant loss.

Technical Specifications:

• Frequency Range: 144 MHz and 433 MHz bands
• Gain: 10.72 dB at 144 MHz, 11.14 dB at 433 MHz
• Front-to-Back Ratio: 23.15 dB (144 MHz), 25.79 dB (433 MHz)
• Beamwidth:
  • 144 MHz: 49.6 degrees
  • 433 MHz: 28.2 degrees
• VSWR:
  • 144 MHz: 1.01
  • 433 MHz: 1.013

Advantages:

This antenna is designed for optimal performance in a variety of operating environments. The dual-band capability saves space and eliminates the need for multiple antennas, making it perfect for portable setups, field days, or home installations where space is limited. With its excellent front-to-back ratio and low SWR, this Yagi antenna ensures reliable, high-quality communication, making it a fantastic choice for DX enthusiasts and repeater users alike.

TORUN - The Only Radio You Need!