Why Choose This Wideband Plane Spiral Antenna for 2-18 GHz?
When your RF applications demand reliable performance across an ultra-broad spectrum, the Wideband Plane Spiral Antenna with SMA connector emerges as a top-tier solution. This professional-grade antenna, designated as the MOP201804, excels in 2-18 GHz communications, offering exceptional signal consistency for demanding environments.
Engineered as a true plane spiral antenna, its patented design leverages right-handed circular polarization (RHCP) to combat signal fading and multipath interference. This makes it particularly effective for SATCOM, radar altimeters, and high-frequency electronic warfare testing. The compact aluminum cavity and robust stainless steel SMA-50K connector deliver a rugged yet lightweight package—weighing just under 50 grams—that simplifies integration into tight spaces like drone payloads or portable test stations.
Technical Specifications: A Quick Reference
The following table summarizes the critical parameters of this Wideband Plane Spiral Antenna, ensuring you have all the data needed for precise system design.
| Parameter | Value |
|———–|——-|
| Frequency Range | 2 – 18 GHz |
| Standing Wave Ratio (VSWR) | ≤ 2.5 (typical) |
| Polarization | Right-Handed Circular Polarization (RHCP) |
| Gain (Beam Center) | ≥ -7 dBi @ 2 GHz
≥ -2 dBi @ 3 GHz
≥ 1 dBi @ 4 GHz and above
≥ 4.5 dBi @ 9 GHz, 10 GHz |
| Back Lobe Level | ≤ 10 dB |
| Beamwidth | ≥ 90° @ 2 GHz (abs. gain ≥ -10 dBi)
≥ 90° @ 3 GHz (abs. gain ≥ -5 dBi)
≥ 90° @ 4 GHz and above (abs. gain ≥ -4 dBi)
≥ 90° @ 9 GHz, 10 GHz (abs. gain ≥ -1.5 dBi) |
| Impedance / Connector | SMA-50K (Stainless Steel) |
| Antenna Weight | ≤ 50 g |
| Antenna Dimensions (L x W x H) | ≤ 55 mm x 55 mm x 40 mm (excl. connectors) |
| Operating Temperature | -50°C to +70°C |
| Storage Temperature | -50°C to +65°C |
How the Wideband Plane Spiral Antenna Delivers Superior Performance
The antenna’s performance profile is a direct result of its spiral geometry. The gradual taper of the spiral arms allows it to radiate efficiently across the full 2-18 GHz band without resonating at discrete frequencies. This enables near-constant beamwidth of at least 90 degrees across the entire range, with gain that rises steadily from -7 dBi at the low end to a peak of 4.5 dBi at 9-10 GHz. Such consistent pattern and gain characteristics are essential for maintaining link quality in frequency-hopping or wideband surveillance systems.
The RHCP polarization provides an additional layer of resilience. In environments where orientation between transmit and receive antennas can vary (e.g., airborne or mobile platforms), circular polarization minimizes polarization mismatch losses. The low back lobe (≤10 dB) further reduces interference from ground reflections or surrounding electronics, optimizing signal integrity.
Durability Meets Practicality for Field Deployments
Built for industrial-grade use, this Wideband Plane Spiral Antenna withstands extreme temperatures from -50°C to +70°C during operation and -50°C to +65°C in storage. The alufer cavity and stainless steel connector ensure robust corrosion resistance and mechanical stability, making it ideal for both indoor laboratory setups and outdoor remote installations. Whether you are integrating it into a phased-array system, a wideband receiver, or automated test equipment, the compact footprint and light weight simplify mounting and reduce structural loading.
Summing Up: A Versatile Tool for Modern RF Systems
If your work involves wideband communications spanning 2 to 18 GHz, the Wideband Plane Spiral Antenna with SMA connector offers an unmatched blend of performance, durability, and ease of integration. Its consistent circular polarization, broad beamwidth, and rugged design ensure reliable operation even in challenging environments. By choosing this antenna, you invest in a solution that maintains signal quality across the entire spectrum—from low-frequency navigation aids to high-bandwidth datalinks. For precise, repeatable results in testing or deployment, this plane spiral antenna stands ready to meet your most demanding specifications.
