pmb series antennas combine a soft blade-type element with a rugged package that is resistant to damage and abuse. the antenna features a molded tab that allows coding of the products enclosure to control 360-degree rotational travel. the pmb mounts to a pcb via one or two screws and meets part 15 requirements. features low cost soft blade-type element rotates 360 degrees omni-directional pattern weather resistant flexible main shaft damage resistant screw-mount ? ant-868/916-pmb data sheet product dimensions description 0.15 (3.9) 0.42 (10.7) 3.54 (90.0) 0.12 (3.0) 0.51 (13.0) 0.29 (7.4) 0.93 (23.5) 0.61 (15.5) 0.31 (7.9) 0.12 (3.0) 0.15 (3.7) 0.17 (4.3) 8-32 unc thread center freq. bandwidth wavelength vswr impedance connection covers 868mhz and 902 - 928mhz 200mhz 1/4-wave <2 typ. at center 50 ohms screw-mount: 6-32 unc screw (included) ordering information ant-868/916-pmb electrical specifications vswr graph rev 12-15-09 typical vswr antenna factor 159 ort lane merlin, or 97532 www.antennafactor.com 541-956-0931 (phone) 541-471-6251 (fax) polar plot & gain information monopole antenna gain and radiation patterns are dependant on the ground plane and layout of the end product. since antenna manufacturers do not measure on standardized ground references, comparison of published specifications is an unreliable indication of actual antenna performance in an end product. optimum full-wave ground planes are impractical for the majority of products on which these antennas are used (the ground plane for 916mhz would be 26.5" in diameter, 418mhz would be 56.5" in diameter). for this reason, antenna factor tests and tunes antennas on reduced-size, compromised ground planes. to avoid mis-comparison or inappropriate application, gain and polar plots do not appear on this data sheet, but are available upon request for most products. electrical specifications and plots measured on 4.00 x 4.00 reference ground plane 1 center 868.000mhz span 248.000mhz 2 center 916.000mhz s11 swr 1:1.619 2:1.670 1 2
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