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Doublequad antenna amateurradio

Hybrid Double Quad (HDQ/...) Antennas

Hybrid Double Quad Antenna 2m 2/HDQ5 Antenna for Amateurradio, Hamradio Double quad antenna with 50 ohm and 4 reflector elements For horizontal and vertical polarisation, in front mast mounting. Technical details: Gain 8,5 dBd, V/R... (2/HDQ5) 218,00 EUR (incl. 19% USt. additional costs of delivery)

Hybrid Double Quad Antenna 2m 2/HDQ11 Antenna for Amateurradio, Hamradio 2m-band VHF (frequency 144.000 MHz - 146.000 MHz / 144.000 MHz - 148.000 MHz) Double quad antenna with 50 ohm, connector N-female, Pmax 800 W 4 reflector elements ... (2/HDQ11) 268,90 EUR (incl. 19% USt. additional costs of delivery)

Hybrid Double Quad Antenna 2m 2/HDQ15 Antenna for Amateurradio, Hamradio 2m-band VHF (frequency 144.000 MHz - 146.000 MHz / 144.000 MHz - 148.000 MHz) Double Quad antenna with 50 ohm, 4 reflector elements as well as 2 x 5 director elements ... (2/HDQ15) 318,70 EUR (incl. 19% USt. additional costs of delivery)

Hybrid Double Quad Antenna 2/HDQ21-DX Antenna for Amateurradio, Hamradio 2m-band VHF (frequency 144.000 MHz - 146.000 MHz / 144.000 MHz - 148.000 MHz) High performance Double quad antenna with 50 ohm , 4 reflector elements as well as ... (2/HDQ21-DX) 404,80 EUR (incl. 19% USt. additional costs of delivery)

Double Quad Antennas Hamradio

Amateurradio

Antennas for Amateurradio, Hamradio
Double Quad Antennas (Biquad Antennas) for 2m

Hybrid double quad antenna (Biquad antennas)

Directional antenna for mobile (portable, contest) and base station use. BAZ fabricates Hybrid Double Quad directional antennas for the 2m range.
All boom beams and items are surface-hardanodized. Material for booms are 20x20 mm, for elementes diameter 10 mm.

The quad antenna is an antenna which is frequently used by amateur radio operators. It consists of a driven element and parasitic elements, like a Yagi; however, the elements are square loops.

Advantages over a Yagi-Uda

---> Higher Gain

The 2-element Quad has almost the same gain as a 3-element Yagi-Uda: about 7.5 dB over a dipole. Likewise, a 3-element Quad has more gain than a 3-element Yagi-Uda

---> Radiation Resistance approximately 50Ω

---> Lower Boom Height

---> Shorter Boom

---> Lower Angle Radiation

---> Broader Bandwidth

The bandwidth for a 3-element Quad antenna that is tuned for maximum gain is limited because excursions from the design frequency unbalance the near resonance condition of the parasitic elements. However, by lengthening the reflector and director elements, thus sacrificing approximately 1 dB gain, the entire 10 meter band may be worked with an SWR below 1.75:1.

Detail Figure Double Quad Antennas

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