3D HELICAL ANTENNAS AND RF FEEDS HELICAL ANTENNAS HRP series Helical Antennas are available for circularly polarized RF systems including: DATA LINK, MOBILE SATELLITE, BASE STATION, FTS (FLIGHT TERMINATION SYSTEM), and SIGNAL MONITORING APPLICATIONS. Helical antennas are available for use in ground-based systems, shipborne platforms and airborne applications. Circularly polarized Helical antennas are ideally suited and regularly deployed for satellite communication, control and telemetry systems. Several models also include the beam tilt, optimized for SATCOM applications. Our innovative helical antennas for Remote Monitoring Station (RMS) applications (see Models HRP-15-RMS and HRP-15-RMSS provide a cost-effective solution to receive RF signals from a desired satellite while discriminating against the adjacent satellite. Carefully balanced elements result in isolation of at least 20dB between two signals from adjacent satellites. HRP-15-RMS effectively replaces two 3.7m L-band reflector antennas which have equivalent angular discrimination. CPA series Helical Arrays are comprised of multiple helical antenna elements for high gain applications. High-gain and high-power CPA antennas are designed for Flight Termination Systems. These antennas interface to highvelocity and high-acceleration pedestals. These arrays are designed to withstand winds in excess of 125 mph. Dissimilar metal junctions are eliminated in high power antennas to improve corrosion resistance. CPA-17/F1 is our high gain and very compact Helical Array Antenna assembly for INMARSAT F1 terminals. This antenna is intended to be used with new compact gimbals for smaller INMARSAT Ship Earth Stations (SES). This greatly reduces the swept volume of the marine antenna system. CPA-17/F1 (old model # 0124-800) is smaller in diameter than conventional standard A/B SES reflector antennas but conforms to INMARSAT F1 SDM gain, sidelobe envelope, G/T, axial ratio and polarization requirements. HRP 88 HRP 12 HRP 15 RMS CPA 042/HP CPA 17/F1 1 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
HELICAL ANTENNAS AND RF FEEDS 3D HQA series, Quadrifilar Helical antennas are available for applications requiring an antenna with a broad beam radiation pattern (half power beamwidths in excess of 145 degrees). The compact size and light weight of the HQA series antennas are attractive for GPS applications and INMARSAT standard C terminals. HQA 22R HAS series omnidirectional Helical antennas are available for cost-effective satellite communication links from mobile platforms such as trucks, railroad cars, locomotives, small boats, aircrafts, automobiles and handheld terminals. Our innovative and patented HMA series Helical Mast antennas provide high gain and omnidirectional coverage with an adjustable and variable elevation beam peak range. The elevation beam can be adjusted manually or remotely using a motorized mechanism. A multisection mast-type antenna HMA-LT (Old Model 9760-800) can be easily disassembled for storage in an 8 package for tactical applications. HAS L (9520-810) HELICAL FEEDS HCF series circularly polarized feeds are available for use in parabolic reflector antennas. Antenna feeds are available for use in antennas for L-band INMARSAT standard A terminals including feeds for antennas aboard ships (Ship Earth Stations) and portable antennas. All feeds are used in our high gain INMARSAT / Standard A and B Ship Earth Station (SES) reflector antennas. HMA LR (9537-800) Feeds are also available for GPS (L1 and L2), Ku-band DSS, telemetry and other reflector antennas for SATCOM applications. Special Ku band feeds are designed to retrofit and upgrade old L-band satcom antennas. HCF 16/V (9390-801) Telephone Fax 2
3D HELICAL ANTENNAS AND RF FEEDS SPECIFICATIONS: Model Old Model RF Power Pol. Size MHz dbic Port (Watts) HRP-01 9610-810 100-160 RHCP 6-12.8 N 28 x 15 100 HRP-02 9610-810 100-160 LHCP 6-12.8 N 28 x 15 100 HRP-029 8617-800 236-330 RHCP 12-17 N 10 length 1000 HRP-232/A HRP-232/A 240-325 RHCP >10 N 45 D x 60 L 200 HRP-035 8617-810 310-400 RHCP 12-16 N 7 length 1000 HRP-06 0234-800 615-654 RHCP 7 N 18 D x 20 L 100 HRP-811/A HRP-811/A 800-1100 Circular 11.5 N 4.5 D x 24 L 200 RP-12 9392-800*** 1200-1350 LHCP 11 N 6.2D x 8.4 L 100 HRP-14 8613-880 1200-1600 RHCP 16 SMA 2.4 D x 24 L 50 HRP-13 0374-800 1200-1600 RHCP 10 N 2.4 D x 12 L 100 HRP-WLL 0260-801 1460-1490 HRP-WLR 0260-802 1460-1490 HRP-WHL 0260-811 1460-1490 HRP-WHR 0260-812 1460-1490 See separate datasheet for Worldspace Maritime Antennas HRP-15 8613-800 1525-1661 RHCP 11.5 SMA 2.4 D x 10 L 70 HRP-15HG 8613-870 1525-1661 RHCP 16 SMA 2.4 D x 24 L 70 HRP-16 9429-810 1610-1630 LHCP 1.8 SMA 3.3 D x 11.6 L 50 HRP-20-24 9413-800* 2030-2100 RHCP 7.8 SMA 0.75 D x 30 L 70 HRP-20-45 9413-820* 2030-2100 RHCP 8.1 SMA 0.75 D x 30 L 70 HRP-20 9414-800** 2045-2055 RHCP 3.0 N 2.75 D x 9 L 70 HRP-20A 9416-810 2064-2074 LHCP 3.0 SMA 2.75 D x 12 L 50 HRP-23 9339-800 2310-2360 RHCP 6.5 SMA 3.8 x3.8 x3.8 50 HRP-22 0342-700 2320-2333 See a separate datasheet HRP-4455/A HRP-4455/A 4300-5900 Circular 12 N 2 D x 4.5 L 100 HRP-77 9653-800*** 7.25-7.75 LHCP 3.5 SMA 0.75 D x 4 H 50 HRP-88 9653-810*** 7.9-8.4 RHCP 3.5 SMA 0.75 D x 4 H 50 * Omni Coverage with beam Tilt ** 8 to 55 coverage *** Airborne applications HRP-20 HRP-16 HRP-01 HRP-20A HRP-15 HRP-029 HRP-20-45 3 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
HELICAL ANTENNAS AND RF FEEDS 3D SPECIFICATIONS: CPA series Model Old Model RF Power Weight Pol. Size MHz dbic Port (Watts) (Lbs) 3 1/8 CPA-042/HP 9209-800 400-450 LHCP 18 Inch Coax 46 x46 x110 12000 375 CPA-042 8617-811 400-450 LHCP 13 N- Jack 30 x30 x84 500 75 CPA-042/HG 9106-800 400-450 LHCP 18 7/8 Coax 62 x62 x73 2000 140 CPA-095 CPA-811/A 800-1100 Circular 17 N 4.5 D x 24 L 500 20 CPA-16 8357-800 1525-1660.5 Circular 17 N f 24 long 70 15 CPA-17/F1 0124-800 1525-1660 RHCP 20.6 N f 27.5 D x 7 H 60 11 CPA-36 9773-800 3.65-6.425 RHCP 14 N f 8 x 4 x 3.5 100 2 CPA-46 9645-800* 4.4-5.85 RHCP > 15 N f 12.5 x 6 x 7.5 15 2 * Steerable antenna with rotary joint (360 azimuth coverage), airborne application CPA-042/HG CPA-042/HP CPA-46 CPA-17/F1 Telephone Fax 4
3D HELICAL ANTENNAS FOR RMS APPLICATIONS Model HRP-15-RMSS (old model # 9507-800): Dual Helix RMS Antenna Array. This array is designed for use as a Remote Monitor Station Antenna in order to receive RF signals from AMSC and TMI central satellites. Model HRP-15-RMS (old model # 9370-810): Dual Helix RMS Antenna Array designed for use with the Solidaridad I and II satellites. The satellites are located at 109.2 west and 113.0 west respectively, the compensated topocentric angle between the satellites is 4.41 at the installation site in Mexico City, Mexico. SPECIFICATIONS: Range: Polarization: Axial Ratio: : DC Power Required: Mounting: Weight: Environmental: Control Connector: Size: 1525 1559 MHz RHCP 2.0dB, maximum Type N Female Connector 26 VDC, 350 ma Base Flange For Deck Mounting 40lbs -20 Deg C to +70 Deg C; Fully Sealed MS3112E-12-10-P Mating Connector Supplied (MS3116f-12-10S) HRP-15-RMS Model: HRP-15-RMS (old Model: 9370-810) Axial Ratio Peak / Null Mode dbic 3 db BW MHz db Spacing 1525 Mode 16.1 1.8 4.45 1559 Mode 15.7 1.8 4.35 1525 Mode 16 1.2 4.46 1559 Mode 15.5 2.0 4.3 1525 Single 13.5 32 0.3 1559 Single 13.3 28.4 1.8 Model: HRP-15-RMSS (old Model: 9507-710) Axial Ratio Peak / Null Mode dbic 3 db BW MHz db Spacing 1525 Mode 13.13 0.5 5.4 1559 Mode 14.65 1.0 5.2 1525 Mode 13.03 0.8 5.3 1559 Mode 14.65 1.0 5.2 1525 Single 8.23 5.6 2.0 max 1559 Single 10.15 / 13.35 Sgl. 5.3 2.0 max 5 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
HELICAL ANTENNAS WORLDSPACE MARITIME APPLICATIONS 3D The HRP- W X X antennas are used by Worldspace maritime subscribers to receive Worldspace s digital radio programming. This new satellite service features entertainment, weather, digital messaging and fisheries information for sailors. Seavy Engineering s omni antennas receive the Worldspace satellite signal and connect to the Worldspace receiver. Two antennas (one LHCP and one RHCP) are used to fully utilize all of the Worldspace radio channels. Separate antenna model numbers are used for Atlantic and Mediterranean maritime areas. These antennas can be easily installed on small boats, yachts and commercial vessels. Because of their 360-degree omni-directional azimuth pattern and broad elevation coverage, they will receive the Worldspace signal in all but extreme boat motions. SPECIFICATIONS: Azimuth Pattern Elevation Pattern Low High Range Polarization RF Connector Omni-directional 18-39 degrees 31-50 degrees 1.452 GHz 1.492 GHz LHCP or RHCP N Jack at base Model Old Model Elevation Coverage Polarization Recommended Usage Area HRP WLL 0260-801 Low LHCP Atlantic HRP WLR 0260-802 Low RHCP Atlantic HRP WHL 0260-811 High LHCP Mediterranean HRP WHR 0260-812 High RHCP Mediterranean Telephone Fax 6
3D HELICAL ANTENNAS WORLDSPACE MARITIME APPLICATIONS SPECIFICATIONS: Model Pol. Elevation Beam Freq. (GHz) Peak (dbic) Axial Ratio (db) Omni (db) Return Loss (db) HRP WLL RHCP 27.5 1.46 1.475 1.49 5.9 5.7 5.6 1.8 2.0 2.2 ± 1.1 ± 0.9 ± 0.6 13.2 HRP WLR LHCP 27.5 1.46 1.475 1.49 6.0 6.2 5.7 1.2 1.5 2.0 ± 0.5 ± 0.3 ± 0.3 17.78 HRP WHL RHCP 42.5 1.46 1.475 1.49 5.6 5.3 5.0 2.0 1.8 2.0 ± 0.7 ± 0.7 ± 0.9 11.0 HRP WHR LHCP 42.5 1.46 1.475 1.49 5.8 5.4 5.8 2.2 2.0 1.6 ± 0.7 ± 0.6 ± 0.4 11.4 HRP W x x HRP-W x x Return Loss Atlantic LHCP HRP-W x x Return Loss Atlantic RHCP HRP-W x x Return Loss Mediterranean LHCP HRP-W x x Return Loss Mediterranean RHCP 7 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
HELICAL ANTENNAS INMARSAT STD M ANTENNA 3D SPECIFICATIONS: CPA-17/F1 (Old Model # 0124-800) : 1.5250 1.5590 GHz Receive 1.6265 1.6605 GHz Transmit Polarization: Right-Hand Circular Axial Ratio: 2 db, maximum System G/T: -4 db/k : 20.6 dbic, minimum Antenna Noise Temperature: 97K, nominal Sidelobe Envelope: 41-25 log theta dbic (21-57 degrees) -3 dbic (57-180 degrees) Uplink Power: 60 watts, Typical Environment: Marine, inside customer radome Weight: 5.5kg approximate RF Port: Series N Jack connector Size: 27.5 Dia x 7 Thick GHz dbic Axial Ratio 1525 20.6 1.7 db 1542 20.6 1.8 db 1559 20.6 1.6 db 1626.5 20.7 1.9 db 1643.5 20.7 1.8 db 1660.5 20.8 1.9 db CPA-17/F1 VSWR Plot CPA-17/F1 1643 MHz 0 Degrees Rotation CPA-17/F1 1542 MHz 45 Degrees Rotation CPA-17/F1 1643 MHz 45 Degrees Rotation CPA-17/F1 1542 MHz 90 Degrees Rotation CPA-17/F1 1643 MHz 90 Degrees Rotation Telephone Fax 8
3D HELICAL ANTENNAS AND RF FEEDS SPECIFICATIONS: Quad Helical Antennas Model Old Model MHz Pol. dbic RF Port Size, Dia x Length Power (Watts) HQA-015 HAS-150 149.5 RHCP 3.5 TNC 8 x 39 350 HQA-040 HAS-400 400.5 RHCP 4.0 TNC 4.5 x 13.5 250 HQA-15HG 9386-800 1525-1661 RHCP 4.0 SMA 2.0 x 5.0 50 HQA-16 9438-800 1525-1661 RHCP 2.2 N 3.3 x 11.6 50 HQA-15 HAS-1575 1575 RHCP 5 at 0, 0 at 90, -2 at 100 SMA 3 x 1.25 20 HQA-18 0465-800 1750-1855 RHCP 1.5 N-f 4.0 x 10.0 20 HQA-21 0073-800 1985-2200 RHCP 2.0(+20-90 ) SMA 0.6 x 3.5 5W HQA-21H 0073-800 1985-2200 RHCP 6.0(+20-90 ) SMA 1.0 x 10.0 5W HQA-22 9806-800 2200-2245 LHCP 2.2 N 1.2 x 2.8 50 HQA-22R 9330-800 2205-2270 RHCP 2.0 SMA 2.38 x 5.4 50 HQA-23 0213-800 2320-2333 LHCP 4.3@54 EL SMA 1.0 x 5.0 50 HQA-24 0335-800 2350 RHCP 3.5 N 3.25 x 7 50 HQA-24 0011-800 2442 ± 50 LHCP 7 SMA 1 x 13.6 50 HQA-25 9429-830 2480-2500 LHCP 2.9 SMA 3.25 x 8.6 50 HQA-37 9539-810 3730-3750 RHCP 2.9 SMA 3.25 x 8.6 50 HQA-51 0069-800* 3700-4200 & 5950-6450 RHCP LHCP > 0 > 0 SMA SMA 1.0x10.0 HQA-58 0011-850 5800 ± 75 LHCP 8 SMA 0.5 x 6 50 * Two bands in one package 20 20 HQA-15HG HQA-16 HQA-51 HQA-22 HQA-22R HQA-21 HQA-24 9 Telephone Fax
HELICAL ANTENNAS AND RF FEEDS 3D SPECIFICATIONS: Omnidirectional Antennas Model Old Model Band dbic Pattern Type Coverage HAS-L 9520-810 L 4-5 Omni 25 70 1 D x 12 L HAS-LG4 9652-810 L / GPS 4.2 Omni 20 70 1 D x 7.7 L HAS-LG6 9650-800 L / GPS 6 Omni 55 90 4.5 D x 5/8 thick HAS-W* 0260 1.45-1.49GHz See separate datasheet * Series of antennas for Worldspace Maritime applications Size HAS-LG4 (9652-810) HAS-L (9520-810) INMARSAT Feeds SPECIFICATIONS: High Mast-Type Antennas for Mobile SATCOM Applications Pattern: Omnidirectional Polarization: RHCP Connector: TNC Model Old Model Band dbic Pattern Type Elevation Beam Peaking Elevation Beam Peak Range Size Dia x Length HMA-LM 9259-800 L ** 9.0 Omni Manual 25 70 0.75 x 35 HMA-LR 9537-800 L ** 9.0 Omni Motorized 25 70 0.75 x 35 HMA-LL 9567-800 L ** 8.0 Omni Manual 10 30 0.75 x 35 HMA-LLL 0245 L ** 6.5 Omni Manual 10 30 0.75 x 38 HMA-LMT 9872-800 L ** 7.0 Omni Manual 10 30 0.75 x 25.6 HMA-LMF 9872-810 L ** 6.0 Omni Fixed 15 0.75 x 15.7 HMA-LTT 9760-800* L ** 8.0 Omni Manual 10 30 0.75 x 35 * Multi-Section, Disassembled in a small package ** 1525 to 1545 MHz for receive and 1626.5 to 1660.5 MHz for Transmit HMA-LR (9537-800) HMA-LM (9259-800) HMA-LL (9567-800) Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA) 10
3D HELICAL ANTENNAS AND RF FEEDS SPECIFICATIONS: Helical Feeds Model Old Model GHz Polarization RF Port Power (Watts) F/D Focal Length * HCF-14 8881-800 1.20-1.66 LHCP N 50 0.3-0.45 - HCF-13 8231-890 1.365-1.375 LHCP N 75/400P 0.3-0.45 - HCF-15 9826-800 1.525-1.660 LHCP SMA 50 0.3-0.45 - HCF-15/P 8231-800 1.525-1.660 RHCP SMA 50 0.3-0.45 - HCF-15/V** 8512-801* 1.525-1.660 RHCP SMA 50 0.38 12.5 HCF-16/V** 9390-801* 1.525-1.660 RHCP SMA 50 0.38 18 HCF-17/V** 9326-800* 1.525-1.660 RHCP SMA 100 0.39 15.75 HCF-50 9203-810 4.0-5.5 LHCP N 75 0.3-0.45 - * Vertex Mounted Feeds ** INMARSAT std A terminal antenna feeds HCF-15 HCF-13 HCF-16/V HCF-15/V HCF-15/P HCF-50 11 Telephone Fax
SPIRAL ANTENNAS 3D CONICAL LOG SPIRALS Our CLS series antennas are compact, moderate gain conical log spirals designed to transmit and receive signals over a broadband. CLS antennas are available for left or right circular polarization. The customer should specify the desired polarization when ordering the antenna. These antennas are also capable of receiving signals in both linear and circularly polarized fields. CLS antennas are ideally suited for use in anechoic chambers and enclosures where space is at a premium and isolation is critical. Standard CLS antennas are intended for relatively permanent installations. The antenna cone is supplied with a mast, which can be mounted on any tripod with a 1/4-20 stud. CLS antennas may be supplied with special mounting holes in the base plate for end mounting. CLS-2010/A CLS-110/A SPECIFICATIONS: Conical Log Spirals CLS-1010/A CLS-2010/A CLS-110/A CLS-5018 100 MHz - 1 GHz 200 MHz - 1 GHz 1-10 GHz 0.5-18.0 GHz Polarization RH Circular ( or LH) RH Circular (or LH) RH Circular (or LH) RH Circular (or LH) Impedance 50 ohms 50 ohms 50 ohms 50 ohms VSWR 2.5 : 1 (max.) 2.5 : 1 (max.) 2 : 1 (Typ.) 2 : 1 (Typ.) Power 100 W cw, 150 W 100 W cw, 150 W 50 W cw, 100 W peak peak peak 1 W Connector N female N female N female SMA female Length 40" 32" 5.5 10" Diameter 26" 13" 4.5" 8" Weight (lbs/kg) 27 / 12.2 17 / 7.7 2 /.9 2.5 / 1.1 CLS-2010/A Typical Antenna Factor and (MHz) 200 300 400 500 600 700 800 900 1000 Antenna Factor (db m-1) 17.2 14.8 16.9 18.7 20.7 22.1 24.1 25.0 25.7 (dbic) -1.0 5.0 5.4 5.5 5.1 5.0 4.2 4.3 4.5 VSWR CLS-2010/A - TYPICAL VSWR 3.00 2.50 2.00 1.50 1.00 200 300 400 500 600 700 800 900 1000 FREQUENCY (MHz) Telephone Fax 12
3D SPIRAL ANTENNAS TRANSMIT-RECEIVE (GHz) Typical Antenna Factor and CLS-110/A Antenna Factor (db m-1) (dbi) CLS-5018 (dbic) 0.5-1.5 1.0 29.23 1.0-1.0 2.0 35.25 1.0 0.0 3.0 38.27 1.5-1.1 4.0 38.77 3.5 0.1 5.0 42.71 1.5-0.9 6.0 43.79 2.0 0.0 7.0 44.63 2.5 0.2 8.0 47.79 0.5 0.1 10.0 48.23 2.0 0.5 12 0.0 14 2.0 16 1.5 0 0-5 -5-10 -10-15 -15 Relative (db) -20-25 Relative (db) -20-25 90 60 30 0 30 60 90 5 GHz CLS-5018 - Radiation Patterns 90 60 30 0 30 60 90 GHz 14 CH2: B -M 1.070 SWR.40 / REF 2.000 SWR CRSR 1.070 SWR +9.6000GHz 3.00 2.50 2 > 2 VSWR 2.00 1.50 1.00 1 2 3 4 5 6 7 8 9 10 STRT +.5000GHz CRSR +9.6000GHz STOP +18.000GHz CLS-5018 - Typical VSWR FREQUENCY (GHz) CLS-110/A - Typical VSWR 13 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
SPIRAL ANTENNAS 3D CAVITY BACKED SPIRALS Our CBS series cavity backed spirals are broadband antennas designed for ECM, surveillance, direction finding, telemetry, and flush mounted airborne applications. These spirals can be used as a separate component antenna or as broadband feeds for reflector type dish antennas. All CBS series spiral antennas exhibit an excellent impedance match and radiation pattern control over the broad operating bands in a compact and lightweight package. These spirals are ideally suited for amplitude matching and phase or gain tracking. The unit-to-unit uniformity and frequency independent performance is ideal for airborne monitoring receiving systems. All cavity-backed spirals are available in RHCP or LHCP. These spirals have been designed to operate in a harsh environment and meet the extremes of the MIL-E-5400 Class 2 specification. CBS-118/A SPECIFICATIONS: Cavity Backed Spirals CBS-118/A CBS-218/A CBS-28/A 1.0-18.0 GHz 2.0-18.0 GHz 2.0-8.0 GHz Beamwidth 3dB 10dB 60 to 90 130 >65 nom. (any principle plane) 120 90 (60 to 110 ) 130-6dBil (1-2GHz) -3 to 0 dbil (2-4 GHz) 0-2dBil (2-18GHz) 0 to 1.5 dbil (4-18 GHz) 2 dbil nominal VSWR (Max) 3.5 : 1 2.5 : 1 2.0 : 1 Power 1 W 1 W 4 W Axial Ratio <4dB (1-2GHz) <2 db (2-12GHz) <3dB (12-18GHz) 3 db max. @ 45 4 db max. @ 60 Polarization RHCP or LHCP RHCP or LHCP RHCP or LHCP Connector SMA female SMA female* SMA female Size 3.5" Dia. x 2.1" L. 2.6" Dia. x 1.6" L. 3.0" Dia. x 2.0" L. Weight 11 oz. 6 oz. 4 oz. * Off centered and tilted connector configuration available (Model CBS-218-40) Telephone Fax 14
3D CAVITY BACKED SPIRALS CSA - 218 40 (Old Model # CBS-218-40) Features: Integrated radome for added protection Ruggedized RWR applications Designed specifically for high speed aircraft Meets 90G shock and MIL-SPEC vibration requirements Range VSWR Beamwidth (3 db) Polarization Axial Ratio Boresight 2 to 18 GHz 3.0:1 Max. + 1 dbi Nominal 75 Typical LHCP or RHCP 1.5 db ± 45 2.0 db Squint Connector Power Handling Weight Finish Design Specification ±6 Max. Precision TNC Female, 40 angle to boresight 1 Watt CW 5.8 oz Max. Semi-gloss black enamel 70,000 ft. altitude CSA - 218-40 15 Telephone Fax sales@ara-inc.com 1-877-ARA-SALE 1-781-829-4590 (MA)
SPIRAL ANTENNAS 3D EQUI-ANGULAR SPIRALS Our equi-angular spiral antennas are designed for impedance and pattern characteristics, which are essentially independent of frequency over the design range. These antennas are ideal for search applications where the polarization of the signal is unknown and/or where freedom from multipath interference effect is desired. The beam is right-circularly polarized on axis off one face, and the left-circularly polarized off the other. The pattern goes to zero in the plane of the spiral. ESA-3/B The ESA-220/A and ESA-3/B are suitable for indoor applications and may be used for low power transmitting. The construction is such as to minimize size and weight, and it can be rolled or folded for ultimate portability. The antenna is fed at the center by a miniature coaxial cable. The ESA-330 antenna is available with a lightweight protective radome. ESA-330 SPECIFICATIONS: Equi-Angular Spirals Polarization: RHCP or LHCP Pattern: Bidirectional Impedance:50 ohms ESA-3/B ESA-220/A ESA-330 100-1000 MHz 200-2000 MHz 300 3000 MHz 3 db Beamwidth 90 90 90 2 dbic 2 dbic 2 dbic VSWR (max.) 2.0 : 1 2.0 : 1 2.0 : 1 Power CW Peak 10 W 100 W 10 W 100 W 10 W 100 W Connector BNC female BNC female SMA female Size 36" x 45" 20" x 25" 10 x 14 Weight (lbs/kg) 5 / 2 3 / 1.5 1 / 0.5 Telephone Fax 16