The ChDB Moxon TX Transmitter Antenna (797) is a directional ground antenna from the Ukrainian manufacturer ChDB (CherkasyDroneBud) for the TX transmitter module in UAV and UGV radio control systems. It provides a more stable signal over long distances and reduces the risk of losing control in high-density air environments — especially relevant for long-range FPV flights and operation with MIL ELRS.

The Moxon design combines compactness and higher directivity compared to a simple dipole: 5.5 dBi gain, linear polarization, 50 Ohm impedance, SMA (male) connector. Within the selected sub-band, the bandwidth with VSWR < 1.5 is 20–30 MHz.

The antenna is easily installed on control panels and external transmitter modules. The operating frequency range is selected for your radio link — the manufacturer offers a range of factory settings in the approximate 370–770 MHz band (see the options table below). On the product page, specify the required sub-band in the characteristics.

Key Features

• Type: Moxon, transmitting antenna for TX.
• Directional radiation pattern — better range and control link stability.
• Gain 5.5 dBi, impedance 50 Ohm.
• Polarization: linear.
• SMA (male) connector — compatibility with TX modules with SMA.
• Bandwidth with VSWR < 1.5: 20–30 MHz (within the selected option).
• Several factory sub-bands to choose from for your ChDB system frequency.

Key Advantages

• Lower risk of losing control at long distances compared to omnidirectional antennas.
• Stability in a "noisy" environment: directivity helps filter out some extraneous signals.
• Universal mounting: control panels, external TX modules, ground stations.
• ChDB's own production: compatibility with 370–550 MHz / MIL ELRS transmitters and kits.
• Low VSWR in the 20–30 MHz operating band — efficient TX power transmission.
• Optimal frequency selection from the catalog for a specific firmware and module range.

Areas of Application

• Ground control TX transmitter for UAVs and UGVs.
• Long-range FPV flights and reconnaissance missions.
• MIL ELRS systems and ChDB radio links in the 370–770 MHz bands.
• Field control points with limited space (more compact than a large Yagi).
• Replacement or upgrade of a standard transmitter antenna for a new module frequency.

Available Frequency Options (ChDB Catalog)

Select the option that matches your TX settings. Specify the exact range in the product characteristics on the website.

Package Contents

• Moxon TX antenna with SMA (male) connector.

Technical Specifications (Common for all variants)

Operation Warnings

• Choose the antenna variant strictly for your TX frequency — an unsuitable sub-band sharply increases VSWR and degrades range.
• Orient the Moxon towards the flight zone (direction to the UAV); you may need to reorient the antenna if the operator's position changes.
• Do not overtighten the SMA connector — tighten without misalignment, use a quality adapter if necessary.
• Keep the antenna away from metal structures and screens that deform the radiation pattern.

The ChDB Moxon TX antenna is a practical way to enhance the ground control link: directivity, 5.5 dBi, and a wide selection of sub-bands allow you to choose an antenna for a specific radio link without compromising on range.

See other products in this category in the Moxon Antennas for Military section.

Moxon Antennas 1-1000 MHz, Moxon Antennas with 5 dBi Gain, 6 dBi Dipole Antennas