Hollyland Spares - Mushroom Antenna (for Mars and Cosmos Series)

The Hollyland Mushroom Antenna (Model: HL-ATN03) is an official OEM high-performance replacement antenna custom-engineered for Hollyland’s flagship Mars and Cosmo series wireless video transmission systems.

Known on set for its distinctive domed "mushroom" capsule shape, this antenna utilizes advanced circular polarization. It is the go-to solution for camera teams operating dynamic handheld setups, Steadicams, or complex motorized gimbals where standard straight-line antennas frequently drop frames or lose connectivity due to extreme camera tilting and rapid multi-angle movements.

Core RF & Operational Features

• Circularly Polarized Wave Architecture: Unlike standard flat "paddle" or thin whip antennas that use linear polarization, the Mushroom antenna broadcasts an omnidirectional, spiraling RF wave. This mitigates "cross-polarization attenuation"—the abrupt signal drop that occurs when a camera twists or banks out of direct vertical alignment with the video village receiver.

• Broadband 5 GHz Optimization: Built to operate cleanly within the 5.0 GHz to 5.9 GHz frequency range. It provides a reliable 2.5dBi gain, ensuring low-latency 4K and HD video feeds slice right through heavy on-set Wi-Fi interference.

• Impact-Resistant Domed Cap: The delicate internal antenna elements are entirely enclosed inside a thick, ruggedized injection-molded capsule shell. This reinforced design easily withstands accidental bumps, equipment drops, or being jostled during tight camera handoffs.

• Flexible Extension Stem & RP-SMA Lock: Features a robust, flexible lower neck that absorbs mechanical strain, preventing damage to the unit’s connector. It attaches via a gold-plated Reverse Polarity SMA (RP-SMA) internal female thread to ensure a lossless, secure physical mount.

System Interoperability

This performance-tuned broadcast spare features universal standard threading calibrated for Hollyland's 5 GHz video lines:

• Mars Wireless Series: Direct match for the Mars 4K, Mars 400S Pro, Mars 400S Pro II, and Mars 300 Pro wireless transmission systems.

• Cosmo Ecosystem: Seamlessly interfaces with Cosmo C1 wireless SDI/HDMI transmission packages.

Technical Specifications Matrix

On-Set RF Configuration Tip: To maximize transmission range and prevent latency glitches, always match your antenna polarization types on both ends of your wireless line. For optimal results, mount a pair of these dome-styled Mushroom antennas onto your on-camera transmitter, and pair them with matching circularly polarized antennas at video village. Mixing a circular capsule antenna on the camera with standard flat linear paddle antennas on your monitor can cut your system's effective transmission distance by up to 50 percent.