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How to Select an Antenna

How to Select an Antenna Compared: Gain, Beamwidth, Size and Connector

How to Select an Antenna — Selecting an antenna is a process of matching frequency, gain, polarization, pattern
How to Select an Antenna

A side-by-side table of every how to select an antenna in the catalog, sorted so the gain-versus-size trade-off is visible at a glance. Higher gain on the same band always costs aperture length, and on a mast that length is a wind-load number, not a footnote.

The trade-off in one sentence

Between the smallest and largest model here the gain moves from 1 to 35 dBi while the longest dimension moves from 3 mm to 2570 mm. That is the whole negotiation: roughly every 3 dB of additional gain doubles the effective radiated power in the main lobe and costs about twice the aperture.

Full comparison

Full comparison
ModelBand (MHz)GainPolarizationHPBW H×VVSWRIPLengthConnector
AW-PA2425-V18B652400–250018 dBiVertical65° × 7°≤ 1.5:1IP651000 mmN-Female
AW-PA7090-V18B65698–96018 dBiVertical65° × 7°≤ 1.5:1IP652570 mmN-Female
AW-PA8090-V18B65806–96018 dBiVertical65° × 7°≤ 1.5:1IP652430 mmN-Female
AW-YG0890-18824–96018 dBiVertical30° × 25°≤ 1.5:1IP651290 mmN-Female
AW-YG2400-182400–248318 dBiVertical30° × 28°≤ 1.5:1IP65580 mmN-Female
AW-YG1922-161720–217016 dBiVertical35° × 30°≤ 1.5:1IP65610 mmN-Female
AW-FG2400-152400–248315 dBiVertical360° × 5°≤ 1.5:1IP671550 mmN-Female
AW-PA2425-V15B652400–250015 dBiVertical65° × 15°≤ 1.5:1IP65500 mmN-Female
AW-PA7090-V15B65698–96015 dBiVertical65° × 15°≤ 1.5:1IP651360 mmN-Female
AW-PA8090-V15B65806–96015 dBiVertical65° × 15°≤ 1.5:1IP651300 mmN-Female
AW-FG0890-12824–89012 dBiVertical360° × 5°≤ 1.5:1IP671550 mmN-Female
AW-PA7090-V12B65698–96012 dBiVertical65° × 30°≤ 1.5:1IP65720 mmN-Female
AW-PA8090-V12B65806–96012 dBiVertical65° × 30°≤ 1.5:1IP65700 mmN-Female
AW-YG0890-12824–96012 dBiVertical48° × 40°≤ 1.5:1IP65465 mmN-Female
AW-FG1922-111920–217011 dBiVertical360° × 5°≤ 1.5:1IP671250 mmN-Female
AW-PA7090-V11B90698–96011 dBiVertical90° × 30°≤ 1.5:1IP65720 mmN-Female
AW-PA7090-V10B120698–96010 dBiVertical120° × 30°≤ 1.5:1IP65720 mmN-Female
AW-FGS2400-92400–24839 dBiVertical360° × 16°≤ 1.5:1IP67780 mmN-Female
AW-FGL2400-82400–24838 dBiVertical360° × 20°≤ 2.0:1IP67560 mmSMA-Male
AW-FGL0827-6698–27006 dBiVertical360° × 30°≤ 2.0:1IP67620 mmSMA-Male
AW-MM2425-4x152400–25004x15 dBiDual ±45° slant / MIMO60° × 14°≤ 1.5:1IP65405 mmN-Female
AW-MM2425-2x152400–25002x15 dBiDual ±45° slant / MIMO60° × 14°≤ 1.5:1IP65405 mmN-Female
AW-PA7090-X2x15B65698–9602x15 dBiDual ±45° slant65° × 15°≤ 1.5:1IP651360 mmN-Female
AW-PA7090-X2x18B65698–9602x18 dBiDual ±45° slant65° × 7°≤ 1.5:1IP652570 mmN-Female
AW-PA8090-X2x15B65806–9602x15 dBiDual ±45° slant65° × 15°≤ 1.5:1IP651300 mmN-Female
AW-PA1722-V18B651710–217018 dBiVertical65° × 7°≤ 1.5:1IP651120 mmN-Female
AW-PA1722-V15B651710–217015 dBiVertical65° × 15°≤ 1.5:1IP65620 mmN-Female
AW-PA1722-V12B651710–217012 dBiVertical65° × 30°≤ 1.5:1IP65330 mmN-Female
AW-PA8025-H12B65806–250012 dBiHorizontal65° × 30°≤ 1.5:1IP65660 mmN-Female
AW-PA8025-V12B65806–250012 dBiVertical65° × 30°≤ 1.5:1IP65660 mmN-Female

Reading the table

  • Gain is referenced to an isotropic radiator (dBi). Subtract 2.15 to compare against a figure quoted in dBd.
  • Beamwidth is the half-power (−3 dB) width. Coverage does not stop at that edge; it is simply where the signal has fallen to half power.
  • VSWR is a band-edge worst case. At 1.5:1 about 4 percent of forward power is reflected, which is negligible next to a typical feedline loss.
  • Length is the number that decides the mount and the wind load, and it is the constraint that most often forces a lower-gain choice.

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