Wideband Horn Antenna
Wideband Horn Antenna offers broad frequency bandwidth and stable radiation characteristics for microwave and mmWave applications. Ideal for radar systems, RF measurement setups, antenna calibration ranges, satellite communication research and electromagnetic compatibility testing.
High-Performance Wideband Horn Antennas for Multi-Octave Signal Monitoring
AO Microwave’s high-precision wideband horn antennas are engineered to transmit and receive RF and microwave energy over extremely broad frequency ranges (typically several octaves, such as 1 to 18 GHz or 2 to 18 GHz). Precision-fabricated from high-durability aluminum and copper-alloy sheets via advanced CNC milling and electroforming, these pyramidal horns incorporate custom coax-to-waveguide transitions to maintain smooth impedance matching. Operating up to 50 GHz, our wideband horn antennas deliver a low input VSWR of < 1.50:1 across the entire operating band, highly predictable gain curves, and robust polarization purity.
By utilizing mathematically optimized flare contours, our wideband horns maintain highly stable radiation patterns. They are critical for broadband electromagnetic compatibility (EMC/EMI) compliance testing, electronic warfare (EW) surveillance monitoring, and multi-octave laboratory measurement systems.
| Part No | Frequency/GHz | VSWR (Max) | Gain/dB (Avg) | E Plane 3dB Beamwidth (Typ) | H Plane 3dB Beamwidth (Typ) | Polarization | Interface Type |
|---|---|---|---|---|---|---|---|
| AO1G2G-HA15NK | 1-2 | 1.5 | 15 | 30° | 30° | Linear | N Female |
| AO2G4G-HA15NK | 2-4 | 1.5 | 15 | 30° | 30° | Linear | N Female |
| AO4G8G-HA15NK | 4-8 | 1.5 | 15 | 30° | 30° | Linear | N Female |
| AO8G18G-HA20NK | 8-18 | 1.5 | 20 | 18° | 18° | Linear | N Female |
| AO18G40G-HA202.92K | 18-40 | 1.6 | 20 | 18° | 18° | Linear | 2.92mm Female |
Suppressing Spurious Higher-Order Modes in Broadband Horns
Broadband horn antennas must maintain stable radiation patterns across several octaves of frequency. In standard rectangular waveguide horns, higher-order modes (such as TE20 or TE01) can propagate at higher frequencies, causing phase distortions across the aperture.
If left unmanaged, these higher-order modes interfere with the dominant TE10 mode, leading to beam splitting (lobing) and degrading the main radiation lobe at the high-frequency limit. To prevent this, AO Microwave uses computerized 3D electromagnetic simulations to optimize the flare contour and transition geometry. This suppression of higher-order modes ensures a clean, single-lobed radiation pattern across the entire operating band.
Target Applications & Operational Advantages
By providing predictable radiation patterns and high power handling, our wideband horn antennas secure critical measurement setups:
EMC/EMI Compliance Testing
Function: Radiates or receives RF signals inside EMC anechoic chambers to evaluate product compliance.
Advantage: Exceptional bandwidth (e.g., 2 to 18 GHz) allows for wide frequency sweeps without needing to switch antennas, reducing test time.
Electronic Warfare (EW) Surveillance
Function: Monitors broadband spectrum to detect and analyze hostile transmitter signals.
Advantage: Symmetrical housing machining and low-expansion materials ensure stable gain flatness, preventing signal detection dropouts.
Multi-Octave Lab Test Benches
Function: Serves as a versatile transmitter or receiver antenna in multi-frequency measurement setups.
Advantage: Low VSWR (<1.50) minimizes reflections, protecting active drivers and ensuring accurate, repeatable references.
Wideband Horn Antenna FAQs
Need high-performance Wideband Horn Antennas?
Specify your frequency range, required gain, and coaxial connector interface — we'll quote in 24 hours.
