Attachment Exhibit A

This document pretains to SES-STA-20160520-00446 for Special Temporal Authority on a Satellite Earth Station filing.

IBFS_SESSTA2016052000446_1136629

Radiation Testing MicroSAT KA Satellite Terminal MicroSAT KA Radiation Testing Rev 2.0 February, 2015 February, 2015 Proprietary and Confidential Information Page 1 of 14

Radiation Testing The information and ideas contained herein are proprietary to Sky Beam Ltd and shall not be duplicated or disclosed outside the receiving organization or the receiving organization's potential customer without prior written approval from Sky Beam, nor used by the receiving organization or any of its subsidiaries or affiliates, for any purpose other than evaluation of the ideas and work contained herein. February, 2015 Proprietary and Confidential Information Page 2 of 14

Radiation Testing Table of Content 1. Document Properties ............................................................................................................ 4 1.1 People ...................................................................................................................................................... 4 1.2 Distribution .............................................................................................................................................. 4 1.3 Change Log ............................................................................................................................................... 4 2. Introduction ......................................................................................................................... 5 3. Test Set-up ........................................................................................................................... 5 3.1 Overview .................................................................................................................................................. 5 3.2 Description ............................................................................................................................................... 5 3.3 Sampling Process ..................................................................................................................................... 6 4. Testing Results ..................................................................................................................... 7 4.1 Rx Measurements .................................................................................................................................... 7 4.1.1 Rx Radiation Pattern ................................................................................................................................ 7 4.1.1.1 Directivity Pattern ................................................................................................................................. 7 4.1.1.2 Gain variation within Rx frequency ....................................................................................................... 8 4.1.1.3 Azimuth Pattern (RHCP), 20GHz............................................................................................................ 9 4.1.2 Rx Cross Polarization .............................................................................................................................. 10 4.2 Rx Summary ........................................................................................................................................... 10 4.3 Tx Measurements .................................................................................................................................. 11 4.3.1 Tx Radiation Pattern .............................................................................................................................. 11 4.3.1.1 Directivity Radiation Pattern ............................................................................................................... 11 4.3.1.2 Gain variation within TX frequency .................................................................................................... 11 4.3.1.3 Azimuth Tx Pattern (LHCP), 30GHz ..................................................................................................... 12 4.3.2 Tx Cross Polarization .............................................................................................................................. 13 4.4 Tx Summary ........................................................................................................................................... 13 5. Final Measured Specifications ............................................................................................. 14 5.1 Electrical ................................................................................................................................................. 14 February, 2015 Proprietary and Confidential Information Page 3 of 14

Radiation Testing 1. Document Properties 1.1 People Name Signature Date Author Oleg Roitberg June 24th, 2014 Approved By Ilan Wasserman June 29th, 2014 Authorized By Oleg Roitberg June 29th, 2014 1.2 Distribution Organization Address Contact Name Type Customer 1.3 Change Log Rev No. Date Changes Paragraph Rev 1.1 18.02.15 Final Antenna results added Rev2.0 20.10.15 Ripple Gain Rx/Tx plots added February, 2015 Proprietary and Confidential Information Page 4 of 14

Radiation Testing 2. Introduction The purpose of this document is to summarize the testing results of Sky Beam’s 248x135mm Ka band antenna. 3. Test Set-up 3.1 Overview A Near-field measurement was used to provide an accurate method to determine the antenna gain, pattern, polarization and beam pointing. The planar near-field technique is an effective method for measuring the performance of large antennas or antennas in which the entire 2D pattern has to be measured. An advantage of the near-field measurements is the possibility to observe the fields on the aperture of the antenna. This allowed a closer and detailed look to obtain further information on the antenna performance. 3.2 Description The setup used for the measurements: - An electric-field probe (in this case, an open-ended waveguide) is placed in front of the Antenna Under Test (AUT); - The probe is connected to a Vector Network Analyzer, moved over a planar surface and captures the emissions of the AUT at different points; - The discrete positions in which the probes samples the near field are arranged in a regular two-dimensional grid with distance between adjacent points of half a wavelength (at the analysis frequency); - Several hundreds of field samples are collected, and in particular the electric component of the field (E-field) is sampled; - Since the AUT is designed to operate with circular polarization in both the Rx- and Tx bands, the analysis of the E-field is carried-out sampling both the vertical and Horizontal component of the E-field; - The data collected processed in order to obtain a full pattern, directivity and gain; - The analysis is carried out at two frequencies: 20GHz (for RX band) and 30GHz (for TX band). February, 2015 Proprietary and Confidential Information Page 5 of 14

Radiation Testing 3.3 Sampling Process - The antenna is mounted in the planar far-field measurement setup. - Amplitude distribution of the E-field produced by the antenna at the desired frequency - The data reported is collected in a spatial range larger than the antenna aperture. February, 2015 Proprietary and Confidential Information Page 6 of 14

Radiation Testing 4. Testing Results 4.1 Rx Measurements 4.1.1 Rx Radiation Pattern 4.1.1.1 Directivity Pattern Directivity Pattern (RHCP) produced by the antenna at 20GHz. Maximum directivity is 32.5 dB February, 2015 Proprietary and Confidential Information Page 7 of 14

Radiation Testing 4.1.1.2 Gain variation within Rx frequency February, 2015 Proprietary and Confidential Information Page 8 of 14

Radiation Testing 4.1.1.3 Azimuth Pattern (RHCP), 20GHz February, 2015 Proprietary and Confidential Information Page 9 of 14

Radiation Testing 4.1.2 Rx Cross Polarization 4.2 Rx Summary - The measured directivity is 32.5dB. - Measurements show a maximum level of cross-polarization (LHCP) of -16dB worst case in lower side (18.5 GHz), corresponding to 3dB of Axial Ratio. - The Side Lobe Level (SLL) is -15dB. - Isolation is >50dB - The measured co-pol gain is 31.4dBi. This, assuming a directivity of 32.5dB and considering the mismatching loss (equal to 0.85dB) gives the loss inside the antenna, equal to 0.25dB. - As a consequence, the G/T of the antenna system (considering an LNA with Noise figure of 1.3dB, and a sky noise of 30°K) has an estimated value of 7.6dB. It has to be pointed out that the modalities in which the measurements are taken suggest some caution, because an error of 0.5 dB is easily obtainable. February, 2015 Proprietary and Confidential Information Page 10 of 14

Radiation Testing 4.3 Tx Measurements 4.3.1 Tx Radiation Pattern 4.3.1.1 Directivity Radiation Pattern The 2D Directivity Pattern of the antenna. Maximum directivity at 30GHz is 35 dB 4.3.1.2 Gain variation within TX frequency February, 2015 Proprietary and Confidential Information Page 11 of 14

Radiation Testing 4.3.1.3 Azimuth Tx Pattern (LHCP), 30GHz February, 2015 Proprietary and Confidential Information Page 12 of 14

Radiation Testing 4.3.2 Tx Cross Polarization 4.4 Tx Summary - The measured directivity is 35 dB. - The phase difference between the V-pol and H-pol components of the LHCP radiated average value of 100°, that is close to ideality (90°). - Measurements show a maximum level of cross-polarization (RHCP) of -16dB worst case at lower frequency (29 GHz), corresponding to an axial ratio of 4.3dB. - The 3dB beam width in the two cuts is: 4.3° (Elevation-cut) and 2.7° (Azimuth-cut). The measured gain is 33.8dB - Isolation is >50dB February, 2015 Proprietary and Confidential Information Page 13 of 14

Radiation Testing 5. Final Measured Specifications 5.1 Electrical Parameter Measured Value Comments RX 31.4 dB +/- 0.5 dB Tolerance Error Gain TX 33.8 dB +/- 0.5 dB Tolerance Error G/T RX 7.8 dB/K +/- 0.5 dB/K error AZ 2.7° Beam Width EL 4.3° RX 65 dB Isolation TX 50 dB February, 2015 Proprietary and Confidential Information Page 14 of 14


Document Created: 2016-05-19 17:19:26
Document Modified: 2016-05-19 17:19:26
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC