Cobham Antenna Systems, Microwave Antennas

TECHNICAL INFORMATION

Email Microwave Antennas 

PRIMARY SPECIFICATION - HPBW - Half Power Beam Width

HPBW for Omni Antennas
A dipole is the simplest type of omni-directional antenna.  It has 360° azimuth coverage;  the energy is squeezed from top to bottom to provide gain on the horizon.  The elevation pattern is measured by taking a vertical cut through the beam.  The antenna's beamwidth is defined by the angle over which the radiated energy falls to half its peak level.  This is known as the Half Power Beam Width (HPBW), or the -3dB point.  This will apply to the elevation pattern whilst the azimuth beamwidth will be 360°.

HPBW for Directional and Sector Antennas
Energy is directed from vertical and horizontal sides to produce a directional lobe or sector beam. For directional and sector antennas, azimuth and elevation HPBW are specified separately.

HPBW elevation pattern for omni antenna XPO2V-4.0-18.0/1382	HPBW azimuth pattern for omni antenna XPO2V-4.0-18.0/1382