Optimized Product Description

Ultra-Wideband, Ultra-Precise: The Ultimate 4.3-7.8GHz Circular Polarization Antenna for Demanding FPV Pilots

In the world of long-range FPV and digital video transmission, signal stability is everything. Multipath interference, dynamic aircraft attitudes, and environmental obstacles can turn a perfect flight into a pixelated nightmare. The ACASOM 4.3-7.8GHz 20dBi RHCP High-Gain Antenna is engineered to solve these challenges. Featuring right-hand circular polarization (RHCP), an ultra-wide 44% relative bandwidth, and a commanding 20dBi of gain, this antenna delivers exceptional signal purity, multipath rejection, and extended range for the most demanding FPV, racing, and professional drone applications.

Whether you're flying digital FPV systems, building a high-performance ground station, or seeking the ultimate video link for your long-range rig, this antenna provides the spatial filtering and link margin you need to keep your feed crystal-clear—no matter the attitude or environment.

Why This RHCP Antenna is the Ultimate Choice for 4.3-7.8GHz Systems:

Ultra-Wideband 4.3-7.8GHz Coverage: Seamlessly covers 4300-7800MHz with a massive 44% relative bandwidth—compatible with 5.8GHz FPV, 5.3-5.9GHz digital systems, 6GHz experimental bands, and emerging 7GHz applications. One antenna for all your gear.
20dBi High Gain for Extreme Range: Delivers a powerful 20dBi of gain, dramatically extending your video transmission range and providing superior link margin for long-range exploration and BVLOS operations.
Right-Hand Circular Polarization (RHCP): The circular polarization design effectively mitigates multipath interference caused by reflections from buildings, terrain, and water. It also ensures stable signal transmission under dynamic attitude changes between your drone and ground station—no more signal dropouts during aggressive maneuvers.
Exceptional Spatial Filtering: Features 24° half-power beamwidth (HPBW) in both elevation and azimuth, providing focused, directional coverage with excellent rejection of off-axis interference.
Superior Signal Purity: Maintains VSWR < 1.5 and ≥90% radiation efficiency across the entire band, ensuring every watt of your VTX power is converted into effective, clean signal transmission.
Precision Engineering & Durability: Built with a compact 210x210x15mm form factor, weighing just 230g. The robust construction is designed for ground station tripods, vehicle mounts, and fixed installations.

Technical Specifications:

Parameter	Specification
Frequency Range	4300 – 7800 MHz (4.3-7.8 GHz)
Peak Gain	20 dBi
VSWR	< 1.5
Radiation Efficiency	≥ 90%
Polarization	Right-Hand Circular Polarization (RHCP)
Half-Power Beamwidth (EL)	24°
Half-Power Beamwidth (AZ)	24°
Front-to-Back Ratio	> 15 dB (typical)
Input Impedance	50 Ω
Power Handling	30 W
Connector	SMA-Male
Dimensions	210 x 210 x 15 mm
Weight	230 g

Performance Characteristics:

Frequency (MHz)	Typical Gain (dBi)	VSWR
4300	~18.5	< 1.5
4900	~19.2	< 1.4
5500 (5.8GHz FPV)	~20.0	< 1.3
6100	~20.0	< 1.3
6700	~19.5	< 1.4
7800	~18.8	< 1.5

Ideal For:

Digital FPV Systems (DJI, Walksnail, HDZero): Maximize video range and clarity with optimal circular polarization matching
Long-Range Analog FPV: Push 5.8GHz video links to their absolute limits with 20dBi of focused gain
FPV Racing Drones: Maintain stable video during high-speed turns and aggressive maneuvers with multipath-rejecting RHCP
Ground Station & Receiver Modules: The perfect directional antenna for tripod-mounted diversity systems and automated trackers
6GHz & 7GHz Experimental FPV: Future-proof your setup with ultra-wideband coverage for emerging frequency bands
Drone Telemetry & Control: Enhance 5.8GHz data links for professional UAV operations

Package Includes:

1 x 4.3-7.8GHz 20dBi RHCP High-Gain Antenna
Mounting hardware (varies by configuration—please verify in product images)

Critical Usage Notes:

Polarization Matching: For optimal performance, ensure your transmitting antenna also uses RHCP. Mixed polarization (RHCP with LHCP) will result in significant signal loss.
Precision Aiming Required: With a 24° beamwidth, this antenna requires accurate alignment with your drone for maximum gain. Ideal for use with antenna trackers or for fixed flight paths.
Connection Sequence: Always connect the antenna to your receiver or transmitter before powering on RF equipment to prevent damage.
Mounting Stability: Use a sturdy tripod or mounting bracket to maintain precise aim, especially in windy conditions.

Why Choose ACASOM?

Ultra-Wideband Performance: 44% relative bandwidth covers 4.3-7.8GHz with one antenna
Circular Polarization Excellence: Superior multipath rejection and dynamic attitude stability
High-Efficiency Design: ≥90% efficiency ensures maximum power transfer
Field-Proven Reliability: Built for professional FPV and UAV applications

Ready to Experience Crystal-Clear, Long-Range FPV Video?
Stop fighting multipath interference and weak signals. The ACASOM 4.3-7.8GHz 20dBi RHCP High-Gain Antenna delivers the focused, clean signal you need for confident long-range flights. Click 'Add to Cart' now and elevate your FPV experience!

4.3-7.8GHz 20dBi RHCP High-Gain Antenna | Ultra-Wideband Circular Polarization for FPV Drone, Digital FPV Systems & Ground Stations | 90% Efficiency, SMA-Male