Description

ETS-Lindgren's Model 3164-01 Open Boundary Quad-ridged Horn Antenna takes the open boundary concept to its extreme by providing a totally open horn, including an open boundary feed cavity. The model 3164-01 allows antenna engineers to perform measurements down to 100 MHz and up to 1 GHz with a single antenna. Its ability to measure two orthogonal polarized fields simultaneously means that it can be used to measure radiation patterns regardless of the orientation of the antenna under test.

Frequency Range
The 3164-01 brings the performance of the 3164 series horns down to 100 MHz. However, the antenna is not simply a scaled model of other horns in the series. To reduce weight and improve the low end performance the antenna was designed without an enclosed feed cavity. Although the feed cavity is not present, the antenna can still be mounted inside chambers; nested in the absorber or against a ground plane. The gain is not dramatically affected by the mounting scheme.

Excellent Gain Characteristics
Like the other 3164 series horns, the 3164-01 has a very fat gain performance for the upper 2/3 of its frequency range. The gain variation over that upper range is usually less than 2 dB variation.

Dual Linear Polarization
The 3164-01 has two sets of orthogonal ridges each fed via a coaxial input. The result is an antenna that can simultaneously measure two orthogonally polarized components of the fled. This characteristic makes it ideal for measuring antennas as they are rotated in the quiet zone on an anechoic chamber or antenna range. The inputs are located extremely close to each other which reduce the difference in gain between them.

Cross-Port Polarization
As in the other horns in this family, the model 3164-01 exhibits great cross-port isolation with levels better than 25 dB.