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1 Överföring av dokument i elektronisk form Detta dokument är en elektronisk kopia. Vid konvertering eller överföring i elektronisk form kan dokumentet bli förvanskat. Det fastställda pappersoriginalet är det gällande dokumentet. Transfer of document in electronic form This document is an electronic copy of the original. When converting or transferring the document into electronic form, it could be distorted. The original paper document is to be considered the valid document. Saab AB (publ) Support and Services Postal address Box 3 SE Östersund Sweden Visiting address Storlienvägen 56 Telephone Telefax Registered office Linköping Registered No We are represented in Arboga, Göteborg, Lidköping, Linköping, Ljungbyhed, Norrtälje, Nyköping, Stockholm, Uppsala, Växjö, Åryd, Örebro, Östersund VAT No SE

2 Distribution 3D-Radar AS Klæbuveien 196B 37 Trondheim Norge Copy OFLV archive Document Test Report Date April 10, 14 Prepared OFLBIA, Björn Olsson Senior EMC engineer Ref. No Supersedes 1(32) Title EMC test of GeoScope Mk 4 radar with antenna DXG18 Summary: The object of the test is to show compliance with the emission requirements of Federal Communications Commission (FCC) Part 15 Subpart F and Industry Canada (IC) RSS-2 for ground penetrating radars (GPR) using ultra wideband (UWB) technology. The EUT complied with the requirement of radiated emissions given in IC RSS-2 and FCC Part 15 Subpart F, including the FCC waivers DA dated January 11, 12, and DA dated August 9, 13. Measured were performed in the frequency range MHz to 18 GHz. The tests have been performed at an Open Area Test Site (OATS). The test site is registered at FCC with the registration number and at IC with the site number 46C-1. Approved: [The original is signed] Lennart Hamberg Technical Manager This report may not be reproduced other than in full, except with the prior written approval of the issuing laboratory. Saab AB (publ.), Support and Services Box 3. SE Östersund, Sweden. Visitors: Storlienvägen 56. Telephone: Telefax: Internal Ref No

3 2(32) Contents 1 General information Test methods and results Results Applicable documents Equipment under test (EUT) Identification of equipment under test General configuration of the EUT Operation of EUT during tests Test site Description Ambient signals Results Measurement of radiated emission, MHz 9 MHz Measurement of radiated emission, 9 MHz 18 GHz Measurement of UWB bandwidth, frequency range and peak emissions... 22

4 3(32) 1 General information Date of test: April 1 and 2, 14 Location of the test: Test performed by: Client: Client s observer: Saab AB Storlienvägen 56 SE Östersund Sweden Björn Olsson, Saab AB 3D-Radar AS Klæbuveien 196B 37 Trondheim Norway Egil Eide, 3D-Radar AS

5 4(32) 2 Test methods and results 2.1 Results The test results in this report apply only for the tested EUT. EMISSION REQUIREMENTS ACCORDING TO FCC Part 15 Subpart F and IC RSS-2 Environmental phenomena Test method Requirement Result Comments Radiated emission MHz 9 MHz ANSI C63.4 FCC 15.9 IC RSS-2, section 3.4 PASS Radiated emission 9 MHz 18 GHz FCC IC RSS-2 FCC 15.9 (d) IC RSS-2, section 6.2.1(d) PASS Radiated emission 1164 MHz 1240 MHz 1559 MHz 1610 MHz FCC IC RSS-2 FCC 15.9 (e) IC RSS-2, section 6.2.1(e) PASS UWB definition FCC 15.3 (a) 15.9(a) IC RSS-2, section 6.2.1(a) PASS 1) f M : f L : f H : f C : 767 MHz 149 MHz 1281 MHz 715 MHz Peak emission at f M FCC IC RSS-2 FCC 15.9 (f) IC RSS-2, section 6.2.1(g) -- Not applicable since f M is below 9 MHz. 1) Included the FCC waivers. 2.2 Applicable documents ANSI C September, 09 American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the range of 9 khz to 40 GHz FCC CFR 47 Part March, 14 Radio Frequency Devices FCC April, 02 Revision of Part 15 of the Commission s Rules Regarding Ultra-Wideband Transmission Systems DA January, 12 FCC Waiver DA August, 13 Amendment to FCC Waiver DA IC RS-Gen December 10 General requirements and Information for the Certification of Radio Apparatus IC RSS-2 March 09 Devices Using Ultra-Wideband (UWB) Technology

6 5(32) 3 Equipment under test (EUT) 3.1 Identification of equipment under test Description: Ground penetrating radar antenna UWB subclass: Ground Penetrating Radar (GPR) Manufacturer: 3D-Radar AS Model name: GeoScope Mk 4 with antenna DXG18 Serial No GeoScope: Serial No antenna: 6177 Build state: Production samples The following configuration settings in the EUT were used: File: systemconfigfcc.txt Revision: 2841 Date: 2 April, 14

7 6(32) 3.2 General configuration of the EUT The antenna was attached to the GeoScope by a cable supplied by the customer. The GeoScope was placed beside the test area. See also Picture 1 and 2 for a description of the setup. The GeoScope unit was connected through a shielded Ethernet cable to a PC placed approximately 10 m from the test area. The measurements were performed with the stepping frequency function in the EUT active. Picture 1. Schematic illustration of the EUT setup.

8 7(32) Picture 2. The GeoScope with its power supply unit placed beside the test area. 3.3 Operation of EUT during tests The EUT was gathering data like in normal operation. The data was presented on the PC.

9 8(32) 4 Test site 4.1 Description The measurements were all performed on a weather protected open area test site (OATS) that was modified with a flat sand bed located in the ground plane. The depth of the sand bed was more than 0.5 m. The EUT was positioned on the sand bed with no ground plane beneath. At frequencies below 9 MHz the measurement distance from the antenna to the EUT was 3 m. The measurement receiver and related equipment, such as a PC and equipment for remote control, were placed next to the test site approximately 10 m from the antenna. At frequencies above 9 MHz the measurement distance from the antenna to the EUT was 1 m. The measurement receiver and a preamplifier were placed next to the measurement antenna while other related equipment was placed next to the site. 4.2 Ambient signals A number of ambient signals were frequently detected in the different frequency ranges where measurements were made, see table below. Additionally, many signals of shortterm duration were found. Each measurement signal close to or above the limit was examined if ambient or related to the EUT. Frequency Service 87 MHz 108 MHz FM Broadcast 390 MHz 395 MHz Mobile radio (TETRA) 4 MHz 815 MHz Television 876 MHz 9 MHz Mobile phones (GSM) 9 MHz 1164 MHz Aironautical radio 1.0 GHz 1.3 GHz Radar system 1.7 GHz 2.2 GHz Mobile phones (DECT, GSM, W-CDMA) 2.4 GHz 2.5 GHz Wireless-LAN

10 9(32) 5 Results 5.1 Measurement of radiated emission, MHz 9 MHz Requirements according to FCC 15.9 (d) and IC RSS-2 Radiated emission from the EUT in the frequency range MHz to 9 MHz shall not exceed the limit as specified below. Frequency range Limit 88 MHz 40 dbmv/m MHz 43.5 dbmv/m MHz 46 dbmv/m Procedures The radiated emission was measured on an Open Area Test Site (OATS) with 3 meters measuring distance as described in section 4.1, see Picture 3. The EUT was configured and the test was performed in accordance with ANSI C63.4. The test was initiated with a pre-scan with peak detector in the frequency range MHz to 9 MHz. The emission level was measured in 64 different combinations of 16 EUT angle positions plus vertical and horizontal polarisation and two antenna heights. For each position the EUT was turned manually. The antenna height was changed in two steps at 1.0 m and 2.5 m. The measurement software was used to add antenna factors and cable attenuation and to form a composite trace of the peak field strength. EUT positions and frequencies with the highest emission were selected based on the prescan. EUT angle, antenna height and antenna polarisation were thereafter adjusted in order to find the highest emission level. The antenna height was changed between 1 m and 4 m. At these maximized positions quasi peak values were measured.

11 10(32) Picture 3. Measurement setup Deviations from ANSI C63.4 The test site was arranged according to FCC with a flat sand bed located in the ground plane Environmental conditions Temperature (inside test facility): 12 to C

12 11(32) Results Results are valid for the described arrangement and operation of the tested EUT. The EUT complied with the requirement of radiated emission specified in FCC 15.9 (d) and IC RSS-2 in the frequency range MHz 9 MHz with a margin of 0.1 db. No narrowband signals above the limit line were related to the EUT. Emission levels measured with both peak detector and quasi-peak detector according to FCC 15.9 and IC RSS-2 are shown in the diagrams below. Emissions with the highest level are presented in the table below. Frequency (MHz) Limit (dbμv/m) Quasi peak Result (dbμv/m) Margin (db) Notes Pass Pass Pass Pass Pass Pass Pass Pass

13 12(32) Composite trace of emissions. MHz 9 MHz. Peak detector, 1 khz bandwidth :22:47, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, FCC Title , IC RSS-2, RADIATED EMISSION, QP, 3 m Level (dbuv/m) Peak Merged M 100M 9M Frequency (Hz) Ambient emission. MHz 9 MHz. Peak detector, 1 khz bandwidth :26:38, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, QP, 3 m Peak Merged M 100M 9M Frequency (Hz)

14 13(32) Quasi-peak measurement in maximised positions. MHz 9 MHz. Quasi-peak detector, 1 khz bandwidth :22:47, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, QP, 3 m QP Merged M 100M 9M Frequency (Hz) Instrumentation Manufacturer Model Range S/N Cal. Interval Cal. Date Rohde & Schwarz ESU26 Hz 26.5 GHz month October 12 EMI-receiver Chase CBL6111A MHz month February 12 Bilog antenna EMISYS 140K Not applicable Antenna tower Heinrich Diesel HD /391 Not applicable Controller

15 5.2 Measurement of radiated emission, 9 MHz 18 GHz Requirements according to FCC 15.9 (d, e) and IC RSS-2 Ref No Radiated emission from the EUT shall not exceed the limit as specified below. Measurements are performed up to 18 GHz, which include the 10 th harmonic of the centre UWB frequency, see Frequency range Limit Limit* Limit** MHz dbm EIRP 29.9 dbmv/m 39.4 dbmv/m MHz dbm EIRP 41.9 dbmv/m 51.4 dbmv/m MHz dbm EIRP 43.9 dbmv/m 53.4 dbmv/m MHz dbm EIRP 53.9 dbmv/m 63.4 dbmv/m > 100 MHz dbm EIRP 43.9 dbmv/m 53.4 dbmv/m 14(32) Frequency range Limit Limit* Limit** MHz dbm EIRP 19.9 dbmv/m 29.4 dbmv/m MHz dbm EIRP 19.9 dbmv/m 29.4 dbmv/m * Converted to field strength level at 3 meters according to FCC (g) ** Converted to field strength level at 1 m according to E 1m = E 3m dbmv/m Procedures Radiated emission was measured on an Open Area Test Site (OATS) with 1 m measuring distance between the EUT and the measurement antenna, see Picture 4. The antenna height was fixed at 1 m and the antenna was slightly tilted and pointed towards the EUT. The emission was measured with an RMS detector in the frequency range 9 MHz to 18 GHz. The number of sweep points for the whole frequency range was and the total sweep time was 34 s. Thus the dwell time was 1 ms.

16 The following resolution bandwidths, video bandwidths and sweep times were used during the measurements. Frequency range RBW VBW Sweep points Total sweep time 9 MHz 18 GHz 1 MHz 5 MHz s 1164 MHz 1240 MHz 1 khz 5 MHz s 1559 MHz 1610 MHz 1 khz 5 MHz s 15(32) Picture 4. Measurement setup. Measurements were performed with the EUT rotated in 16 different positions on the sand bed and with two antenna polarizations resulting in a total of 32 sweeps. Measurement software was used to add antenna factors and cable attenuation and the resulting maximum field strength level were plotted. After the sweeps field strength levels above the limit were checked manually due to the high number of ambient signals.

17 16(32) Environmental conditions Temperature (inside test facility): 12 to C Results Results are valid for the described arrangement and operation of the tested EUT. The EUT complied with the requirement of radiated emission specified in FCC 15.9 (d) and (e) and IC RSS-2 (6.2.1) in the frequency range 9 MHz 18 GHz with a margin of 4.6 db. Emissions above the limit were not related to the EUT. Measured emission levels are shown in the diagrams below. Results are also tabulated including the highest peaks, where peaks were found, originating from the EUT. 9 MHz 18 GHz. RMS detector, 1 MHz bandwidth. Frequency (GHz) Limit * (dbμv/m) RMS level (dbμv/m) Margin (db) Notes PASS PASS PASS PASS PASS PASS * Converted to field strength limit at 1 m according to E 1m = E 3m dbmv/m

18 17(32) 1164 MHz 1240 MHz. RMS detector, 1 khz bandwidth. Frequency (MHz) Limit * (dbμv/m) RMS level (dbμv/m) Margin (db) Notes PASS PASS * Converted to field strength limit at 1 m according to E 1m = E 3m dbmv/m 1559 MHz 1610 MHz. RMS detector, 1 khz bandwidth. Frequency (MHz) Limit * (dbμv/m) RMS level (dbμv/m) Margin (db) Notes PASS PASS * Converted to field strength limit at 1 m according to E 1m = E 3m dbmv/m

19 18(32) Composite trace of peak emissions. 9 MHz 18 GHz. RMS detector, 1 MHz bandwidth :46:43, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 MHz, 1 m 10 RMS: User Assigned Detector 9M 10G 18G Frequency (Hz) Comment: Signals exceeding the limit line were investigated and found to be ambient signals. Ambient emissions. 9 MHz 18 GHz. RMS detector, 1 MHz bandwidth :28:08, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 MHz, 1 m 10 RMS: User Assigned Detector 9M 10G 18G Frequency (Hz)

20 19(32) Composite trace of emissions MHz 1240 MHz. RMS detector, 1 khz bandwidth :49:52, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, 40 FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_1 Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_2 - RMS: User Assigned Detector 1.16G 1.17G 1.18G 1.19G 1.2G 1.21G 1.22G 1.23G 1.24G Frequency (Hz) Ambient emissions MHz 1240 MHz. RMS detector, 1 khz bandwidth :16:26, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, 40 FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_1 Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_2 - RMS: User Assigned Detector 1.16G 1.17G 1.18G 1.19G 1.2G 1.21G 1.22G 1.23G 1.24G Frequency (Hz)

21 (32) Composite trace of emissions MHz 1610 MHz. RMS detector, 1 khz bandwidth :01:13, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, 40 FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_2 Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_1 - RMS: User Assigned Detector 1.55G 1.56G 1.57G 1.58G 1.59G 1.6G 1.61G Frequency (Hz) Ambient emissions MHz 1610 MHz. RMS detector, 1 khz bandwidth :09:25, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, 40 FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_2 Level (dbuv/m) FCC Title , IC RSS-2, RADIATED EMISSION, RMS 1 khz, 1 m_1 - RMS: User Assigned Detector 1.55G 1.56G 1.57G 1.58G 1.59G 1.6G 1.61G Frequency (Hz)

22 21(32) Instrumentation Manufacturer Model Range S/N Cal. Interval Cal. Date Rohde & Schwarz ESU26 Hz 26.5 GHz month October 12 EMI-receiver Miteq AFS MHz 18 GHz month January 14 Pre-amplifier P-44 Huber/Suhner A 0 Hz 18 GHz month August 13 Attenuator Emco GHz - 18 GHz month November 11 Double Ridge Waveguide

23 22(32) 5.3 Measurement of UWB bandwidth, frequency range and peak emissions Requirements and definitions according to FCC and IC Definitions according to FCC 15.3 (d) and IC RSS-2 UWB bandwidth: The frequency band bounded by the points that are 10 db below the highest radiated emission, as based on the complete transmission system including the antenna. The upper boundary is designated f H and the lower boundary is designated f L. The frequency at which the highest radiated emission occurs is designated f M. Center frequency (f C ): Equals (f H + f L )/2. Fractional bandwidth: Equals 2(f H - f L ) / (f H + f L ). Ultra-wideband (UWB) transmitter/device: An intentional radiator that, at any point in time, has a fractional bandwidth equal to or greater than 0. or has a UWB bandwidth equal to or greater than 0 MHz, regardless of the fractional bandwidth Requirements according to FCC 15.9 (a) and IC RSS-2 (6.2.1) The UWB bandwidth of an imaging system operating under the provisions of this section must be below 10.6 GHz Requirements according to FCC 15.9 (f) and IC RSS-2 (6.2.1) For UWB devices where the frequency at which the highest radiated emission occurs, f M is above 9 MHz, there is a limit on the peak level of the emissions contained within a MHz bandwidth centred on f M. The limit is 0 dbm EIRP. It is acceptable to employ a different resolution bandwidth and a correspondingly different peak emission limit, following the procedures described in FCC and in the Annex of IC RS Requirements according to FCC Waivers Combined requirements according to: FCC Waiver DA 12-41, dated January 11, 12 FCC Waiver DA , dated August 9, 13

24 - The device shall operate with stepped frequency modulation in 2 MHz, 10 MHz or MHz steps between 140 MHz and 3 GHz with a scan/cycle rate of approximately 3 ms. - The system may not use any single frequency longer than 2 µs in any 3 ms period of time. - The system total duty cycle on any individual frequency may not exceed 0.07 percent. The time period for measuring the maximum duty cycle cannot exceed 3 ms. - Measurements of emissions from the radar device shall be conducted with the stepping function active. - The radar device shall not be sold in any hand-held configurations. - The radar device shall comply with all other technical and operational requirements applicable to UWB GPR devices under Part 15, Subpart F of the Commission s rules. - The radar device shall implement frequency notching to avoid placing intentional transmissions in the following frequency bands: - 8 MHz 614 MHz MHz 1427 MHz MHz MHz MHz MHz 23(32) Procedures The setup was made so that the EUT antenna was tilted and pointing directly towards the measurement antenna. The measuring distance was 3 m. To determine the spectrum parameters measurements were performed with peak detector with 1 MHz bandwidth with vertical polarisation. Measurement software added antenna factors and cable attenuation.

25 24(32) Picture 5. Measurement setup, MHz 1 GHz. Picture 6. Measurement setup, 1 GHz 4 GHz.

26 25(32) Environmental conditions Temperature (inside test facility): 14 to C Results Results are valid for the described arrangement and operation of the tested EUT. The EUT fulfilled the definition of an UWB transmitter according to FCC 15.3 (d) and IC RSS-2. The EUT complied with the requirement in IC RSS-2 (6.2.1) and FCC 15.9 (a, f) with exceptions declared in the FCC waivers. The EUT also fulfils the requirements of pulse parameters in the FCC waivers. The requirements that the radar device not shall be sold in any hand-held configurations, and that the device shall operate with stepped frequency modulation in 2 MHz, 10 MHz or MHz steps, were confirmed by manufacturer statement but were not verified by measurements. UWB definition Measurement data is presented in diagrams below. From the diagrams data regarding the UWB bandwidth was gathered and calculated. Frequency of highest emission f M Lower boundary f L Upper boundary f H Centre frequency f C Fractional bandwidth MHz 149 MHz 1281 MHz 715 MHz Emission at f M The frequency of highest emission (f M ) was 767 MHz, which is below 9 MHz. Thus, there is no requirement for the emission at f M measured with peak detector over MHz bandwidth.

27 26(32) Frequency band of operation The EUT fulfilled the requirements of frequency band of operation according to the FCC waivers. The used frequency band was verified to be between 149 MHz and 2991 MHz. Pulse parameters The pulse parameters were measured with the receiver in zero span at 483 MHz. Pulse repetition time 3.3 ms Pulse length 2.0 µs Duty cycle The EUT fulfilled the requirement of maximum duty cycle of 0.07 % according to the FCC Waivers. The calculated duty cycle is 0.06 % (2.0 µs / 3.3 ms). Frequency notching The EUT fulfilled the requirements of frequency notching in the FCC Waivers.

28 27(32) Measurements of UWB bandwidth. MHz 1 GHz. EUT tilted. Peak detector, 1 MHz bandwidth :17:43, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged M 100M 1G Frequency (Hz) Measurements of UWB bandwidth. 1 GHz 4 GHz. EUT tilted. Peak detector, 1 MHz bandwidth :26:37, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged 1G 2G 3G 4G Frequency (Hz)

29 28(32) Measurement of pulse repetition time. Peak detector, 1 MHz bandwidth. Measured with zero span at 483 MHz. Ref 80 dbµv * Att 0 db RBW 1 MHz * VBW 5 MHz SWT 4 ms Delta 2 [T1 ] db ms 1 PK * CLRWR 80 Marker 1 [T1 ] dbµv µs A SGL TRG PA PS TRG 34.8 dbµv 6DB AC Center MHz 400 µs/ Date: 1.APR.14 10:57:07

30 29(32) Measurement of pulse length. Peak detector, 1 MHz bandwidth. Measured with zero span at 483 MHz. Ref 80 dbµv * Att 0 db RBW 1 MHz * VBW 5 MHz SWT 10 µs Delta 2 [T1 ] 0.09 db µs 1 PK * CLRWR 80 Marker 1 [T1 ] dbµv ns A SGL TRG PA PS TRG 34.8 dbµv 6DB AC Center MHz 1 µs/ Date: 1.APR.14 11:01:37

31 (32) Notch at 8 MHz 614 MHz. EUT tilted. Peak detector, 1 MHz bandwidth :17:43, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged 590M 594M 598M 2M 6M 610M 614M 618M 622M 626M 6M Frequency (Hz) Notch at 1400 MHz 1427 MHz. EUT tilted. Peak detector, 1 MHz bandwidth :26:37, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged 1.38G 1.39G 1.4G 1.41G 1.42G 1.43G 1.44G 1.45G Frequency (Hz)

32 31(32) Notch at 16.5 MHz MHz. EUT tilted. Peak detector, 1 MHz bandwidth :26:37, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged 1.63G 1.64G 1.65G 1.66G 1.67G 1.68G 1.69G 1.7G Frequency (Hz) Notch at 2690 MHz MHz. EUT tilted. Peak detector, 1 MHz bandwidth :26:37, Client: 3D-Radar, Product: Geoscope MK 4 and DXG18, Level (dbuv/m) Peak Merged 2.67G 2.675G 2.68G 2.685G 2.69G 2.695G 2.7G 2.5G 2.71G 2.715G 2.72G Frequency (Hz)

33 32(32) Instrumentation Manufacturer Model Range S/N Cal. Interval Cal. Date Rohde & Schwarz ESU26 Hz 26.5 GHz month October 12 EMI-receiver Miteq AFS MHz 18 GHz month January 14 Pre-amplifier P-44 Huber/Suhner A 0 Hz 18 GHz month August 13 Attenuator Emco GHz - 18 GHz month November 11 Double Ridge Waveguide Chase CBL6111A MHz month February 12 Bilog antenna