2-18GHz Wideband Circular polarization Spiral Antenna

2-18GHz Spiral Antenna | Wideband Circularly Polarized RF Antenna

The WK-SANT218C7 is a compact 2-18GHz wideband spiral antenna designed for broadband RF applications requiring circular polarization, stable performance and wide frequency coverage. Operating from 2 GHz to 18 GHz, this antenna is suitable for RF testing, signal measurement, spectrum monitoring, wireless communication and other high-frequency applications.

The spiral antenna provides 1-5 dBi gain, 50 Ω impedance and VSWR ≤2.0 typ., delivering reliable broadband performance across its operating frequency range. Its circular polarization and axial ratio of ≤3 dB make it suitable for applications where polarization performance is important, including RF measurement and circularly polarized signal reception.

With a highly compact Φ65 × 34 mm structure, the WK-SANT218C7 offers a practical solution for systems with limited installation space. The antenna uses an aluminum radome and supports a maximum input power of 50 W, providing a durable construction for professional RF environments.

The antenna features DC-ground lightning protection, IP65 water ingress protection, and an operating temperature range of -40°C to +65°C. Its vibration performance complies with MIL-STD-810G, making it suitable for demanding indoor and outdoor RF applications.

Key Features

• Wide frequency range: 2-18 GHz
• Wideband spiral antenna design
• Circular polarization
• Gain: 1-5 dBi
• Axial ratio: ≤3 dB
• VSWR: ≤2.0 typ.
• Impedance: 50 Ω
• Maximum input power: 50 W
• Compact size: Φ65 × 34 mm
• Aluminum radome
• DC-ground lightning protection
• IP65 water ingress protection
• MIL-STD-810G vibration performance
• Operating temperature: -40°C to +65°C
• SMA-Female connector
• Flange mounting

Applications

The 2-18GHz spiral antenna can be used in a variety of broadband RF and microwave applications, including:

• RF testing and measurement
• Spectrum monitoring
• Wireless signal measurement
• Circularly polarized signal reception
• RF laboratory testing
• Antenna measurement systems
• Electronic equipment testing
• Broadband communication systems
• Electromagnetic field measurement
• RF surveillance and monitoring
• High-frequency signal analysis

The WK-SANT218C7 combines wide 2-18GHz frequency coverage, circular polarization, low axial ratio and compact dimensions in a ruggedized design, making it a versatile wideband circularly polarized RF antenna for professional testing, monitoring and communication applications.