Antenna COALAS::DIPOLE-PCB-370-520

Manufacturer: Coalas systems. Product type: Antennas > Dipole antennas.

COALAS::DIPOLE-PCB-370-520 — a compact and lightweight dipole antenna for operation in the UHF band, combining ease of installation and precise frequency tuning. The antenna's design includes perforation lines for mechanical shortening and adjustment of the operating length, allowing one model to be used for several adjacent frequency plans without additional modifications.

Description and advantages

The antenna's thin profile (30 mm) and total length of 310 mm make it ideal for integration inside electronics enclosures or in compact external antenna systems. Its light weight — 25 g — minimizes mechanical stress on mounting points. Perforation lines provide simple and clear mechanical adjustment: during installation, the excess segment can be cut along the markings to achieve a resonant frequency corresponding to one of the indicated values.

Technical specifications

• Frequency range: 370 MHz – 520 MHz (when cut along perforation lines).
• Resonant frequencies, MHz: 380 [5] / 400 [6] / 420 [7] / 440 [8] / 460 [9] / 480 [10] / 500 [11] / 520 [12].
• Bandwidth: 20 MHz (VSWR < 1.6).
• Gain: 2 dBi.
• Connector: IPEX Female with RG178 cable, 220 mm long.
• Dimensions: 310 mm x 30 mm.
• Weight: 25 g.

The IPEX Female connector and 220 mm RG178 cable provide convenient connection to radio modules, trackers, communication modules, and industrial equipment where short cable length and flexibility are important. The 2 dBi gain makes the antenna suitable for local links and applications with balanced requirements for range and radiation pattern.

The perforation lines allow the resonance to be tuned to one of the specified frequencies (380, 400, 420, 440, 460, 480, 500, or 520 MHz) by cutting along special markings. Before mechanical shortening, it is recommended to determine the required resonant frequency and perform VSWR testing after trimming to ensure optimal transmit/receive parameters.

The antenna is suitable for applications in monitoring systems, telemetry, industrial radio communications, for integration into UAV payloads, or in stationary communication points in the 370–520 MHz range. The product is supplied under the Coalas systems brand and is compatible with equipment that has an IPEX Female connector or appropriate adapters.

Compact dimensions of 310 x 30 mm and a weight of 25 g ensure simple integration without significant impact on the overall mass and geometry of the device; the thin profile allows the antenna to be placed in confined spaces within the enclosure. Thanks to its versatile design, one antenna model can replace several options for adjacent frequencies, reducing the need for additional spare parts and simplifying logistics.

Before using the device, always check the connector's compatibility and cable integrity, and perform control VSWR measurements after any shortening along the perforations to confirm operating parameters.

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