AT Microwave Horn Antenna 140–220 GHz | AT-SGA-25-05B

May 22, 2026

AT Microwave Horn Antenna 140–220 GHz | AT-SGA-25-05B

AT Microwave AT-SGA-25-05B Horn Antenna – available from bq-microwave

bq-microwave offers the AT-SGA-25-05B, a WR-05 standard gain horn antenna from AT Microwave for the full G-band. The antenna operates across the entire 140 to 220 GHz range and delivers a typical gain of 25 dBi with linear polarization.

What sets the AT-SGA-25-05B apart

A standard gain horn antenna is a precision-machined horn antenna with a precisely known, calibrated antenna gain. It serves as a reference for gain comparison measurements and as a reliable transmit or receive antenna in mmWave setups. The AT-SGA-25-05B is high-precision machined and gold-plated, ensuring good return loss and repeatable measurement results.

Electrical specifications

  • Frequency range: 140–220 GHz (full G-band)
  • Gain: 25 dBi typ.
  • Polarization: linear
  • 3 dB beamwidth E-plane: 9 degrees
  • 3 dB beamwidth H-plane: 10 degrees
  • Side lobes E-/H-plane: -20 dB
  • VSWR: 1.2:1

Mechanical and connector

  • Antenna port: WR-05 waveguide
  • Flange: UG-387/U-M with anti-cocking flange
  • Material: brass, gold-plated
  • Weight: 30 g
  • High-precision machining with precision gold plating

Typical applications

  • mmWave communication
  • FOD detection (foreign object detection)
  • System setups and measurement benches
  • Antenna gain testing and reference measurements
  • Sub-THz research

The SGA series at a glance

The AT-SGA-25-05B is part of AT Microwave's SGA standard gain antenna series, which covers frequencies up to 750 GHz (down to WR-1.5). With its WR-05 configuration for the G-band, it is particularly suited to mmWave and sub-THz applications in research, communication and test and measurement.

Availability at bq-microwave

bq-microwave is a distributor for AT Microwave in Europe. The AT-SGA-25-05B and further standard gain horn antennas of the SGA series are available at short notice. For quotations and technical advice, contact us at info@bq-microwave.de or +49 151 252 901 28.

Product Data Sheet
Technical specifications as PDF
Download PDF
← All newsRequest product

bq-microwave – your specialist for RF and millimeter-wave components in Europe since 2011.

Get in TouchDownload Linecard