OD49-11D1

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OD49-11D1 is an RF antenna, which is mainly used for narrow-band applications in the UHF frequency range. It is designed for professional indoor radio broadcast systems, as well as mobile and cellular networks. Its main features include a uni-polar beam (curvature) with gridded patterns, a high power handling capability, wide bandwidth and omni-directional radiation pattern characteristics.

The OD49-11D1 is basically a linear dipole antenna. Its design incorporates an insolated grid-like pattern of radiating elements mounted perpendicular to the antenna\'s ground plane. This arrangement produces a uni-polar radiation pattern, with a beamwidth that expands gradually from its center, in a manner analogous to a cone-like shape. The antenna is usually grounded to a metal or conductive surface to ensure a stable frequency response.

In addition to its linear dipolar configuration, the antenna also features a hybrid polarization mode, which combines vertical and horizontal radiation characteristics. This polarization mode is achieved by the lower and upper portions of the antenna emitting azimuthally-opposite waveforms, which cancel each other out over a wide radius. This allows for an extended radiated range with a strengthened signal field.

The antenna\'s key performance specifications include a wide frequency bandwidth of 0.2 – 4 GHz, operation temperature range of -40°C to +75°C, power handling capability of up to 500 Watts, and a maximum gain of 12.5dB. It also features low VSWR, as well as an IP67 rating for weatherproof operation.

The OD49-11D1\'s working principle is based on the principle of induction. Electromagnetic waves generated by its feed element are coupled into the radiating elements due to mutual inductive coupling. This induces an electric signal on each of the antenna\'s radiating elements, creating an electromagnetic wavefront that radiates along its main beam. The horizontal and vertical components of the wavefront determine the antenna\'s uni-polar radiation pattern.

The OD49-11D1 is a robust, reliable, and powerful RF antenna, suitable for narrow-band applications in the UHF frequency range. Its design ensures consistent performance and optimal efficiency in these applications. It is widely used in broadcast, cellular and radar communication, and is ideal for long ranges and in highly congested environments.

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