Omnidirectional Antenna Info

1630-EX-ST-2018 Text Documents

Metrom Rail, LLC

2018-09-18ELS_216202

BroadSpec T M UWB Antenna TIME DOMAIN ® Cummings Research Park 4955 Corporate Drive Suite 101 Huntsville, AL 35805 USA http://www.timedomain.com Tel: +1 256.922.9229 +1 888.826.8378 Fax: +1.256.922.0387 320-0385C June 2017

TM BroadSpec Antenna 2 Copyright All rights reserved. Time Domain® 2001-2017. All rights reserved. Trademarks Time Domain®, PulsON®, and “PulsON Triangle” logo are registered trademarks of Time Domain. Any trademarks, trade names, service marks or service names owned or registered by any other company and used in this manual are the property of its respective company. Rights Rights to use this documentation are set forth in the PulsON Products Terms and Conditions of Sale. Document Information Time Domain reserves the right to change product specifications without notice. Any changes to the functionality or specifications will be issued as specific errata sheets or will be incorporated in new versions of this document. The latest version of this document and future documents can be found on the Time Domain website. The name/number and date of this document can be found on the left side of the cover page.

TM BroadSpec Antenna 3 1 Summary Time Domain’s BroadSpecTM is a planar elliptical dipole UltraWideband (UWB) antenna. Its primary use is with the members of Time Domain’s PulsON® 400 (P400) series of UWB modules. As of this date, the P400 family includes the P400, P410, P412, and P440. Members of this series are also referred to as P4xx platforms. The BroadSpec has a standard SMA connector that allows it to be connected to either port of a P4xx. It can also be used with Time Domain’s PulsON 330 (P330) module. Phase Center TM Fig. 1: BroadSpec antenna with phase center indicated 2 Performance Specification Radiated Waveform: 500 ps Monocycle: 1 Ns waveform Pattern: Omni in azimuth to +/- 1.5dB Polarization: Vertical VSWR: ~ 1.75:1 S11: ~12 dB Gain: Nominally ~3dBi (see Section 4) Phase Response: Linear Efficiency: Nominally ~90%

TM BroadSpec Antenna 4 3 Mechanical Specification Width: 1.15” (2.92 cm) Height: 2.4” (6.1 cm) Thickness: 0.065” (0.165 cm) When mounted vertically on a SMA connector, the tip of the antenna will be within +/-1.5 mm from true vertical. 4 Range Measurement Applications When using the BroadSpec antenna for Two-Way Time-of-Flight (TW-TOF) distance measurement, all range measurements are taken from the phase center of one antenna to the phase center of the second antenna. Note that there is only one phase center and the location is indicated in Figure 1. Ranges measured from the phase center of one antenna to the side opposite the phase center will be longer by 1.5 mm. This reflects the fact that the RF is passing through the antenna to reach the phase center.

TM BroadSpec Antenna 5 4 Antenna Beam Patterns Figure 2 below shows the antenna azimuth beam pattern. 0 and 180 degrees are perpendicular to the flat face of the antenna (“boresight”) while 90 and 270 degrees are at the edges of the antenna. Note that when two radios at the same elevation are rotated so the flat sides of the antennas face one another, radio performance will be approximately 6 dB higher than when the antennas are edge-on. (a) 270 90 (b) 0 (c) (d) Fig. 2: Azimuth Beam Pattern for (a) 3 GHz, (b) 4 GHz, (c) 5 GHz, and (d) 6 GHz

TM BroadSpec Antenna 6 Figure 3 illustrates the elevation beam pattern. Note that the peak of the antenna gain is elevated approximately 20 degrees and is 2 dB higher than the gain at 0 degrees. Therefore, two radios at the same physical elevation (altitude) can achieve a 4 dB increase in performance if the antennas are tilted 20 degrees towards each other. 0 (a) 270 90 (b) 180 (c) (d) Fig. 3: Elevation Beam Pattern for (a) 3 GHz, (b) 4 GHz, (c) 5 GHz, and (d) 6 GHz


Document Created: 2017-06-01 09:31:54
Document Modified: 2017-06-01 09:31:54
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