ASC_3000_Spira-cone_antenna_broch.pdf

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1、 1 Type 3000 Series GRANGER HF Broadband Multi-Mode SPIRA-CONE Antennas 2 to 30 MHz Frequency Range, Dependent Upon Type Up to 20 kW Average, 40 kW Peak Power Rating Horizontal Elliptical Polarization to Reduce Fading Omnidirectional Log-Periodic 2.0:1 VSWR Multi-Mode Capability for Short-, Medium-

2、and Long-Range Communications Single Tower for Simplicity of Installation Innovative Switching or Combining of Radiators to Provide Switchable or Simultaneous Short- or Long- Range Mode. General Description Many operational applications require short and medium-to-long-range omnidirectional antennas

3、; for example, shore-to-ship and ground- to-air services. Conventionally, this requirement has been fulfilled by means of conical or biconical monopole arrays used in conjunction with an extensive ground screen. This type of antenna produces useful beams at low take-off angles, but with comparativel

4、y little gain and no short range capability. An alternative is to use a number of horizontally polarized, log-periodic arrays arranged in a triangle or a square with the feed point at the center. This solution produces an improvement in performance, but such antennas are expensive and require extens

5、ive land. The SPIRA-CONE uses a four-arm conical logarithmic spiral with interleaved wire elements and does not require a groundscreen. The 300 Series antennas employ horizontal-elliptical polarization, with its well-known advantages of minimizing fades because of Faraday rotation effect. The antenn

6、as are log- periodic, spiral arrays, supported with the exception of the low profile version, on a single, central, guyed tower for simplicity of installation. The apex of hexagonal cone points towards the ground and its height above ground determines the take-off angle of the main (lowest) lobe. Al

7、ternative configurations are offered to enable the best choice of take-off angle for a variety of applications. By pointing the apex of the cone towards ground, problems associated with low efficiency at the low frequencies and pattern fragmentation, as a result of multi- lobing at the high frequenc

8、ies, are avoided. Clockwise or counterclockwise rotation of the electric field as required by the geographical location of application of the antenna can be chosen at the time of installation, as no components of the array are special to any particular direction of rotation. In the northern hemisphe

9、re, a transmitting antenna must be clockwise whereas receiving antenna 2 must be counterclockwise. Conversely, in the southern hemisphere, the transmitting antenna must be counterclockwise, while the receiving antenna must be clockwise. Reflection efficiency is improved by the proper interaction of

10、the radiated electromagnetic wave, the electrons in the ionosphere, and the earths geomagnetic field acting on the “ordinary wave” component of the circularly polarized wave. Features Choice of Operating Modes. Two families of elevation patterns (mode 1 and mode 2) can be generated by selective exci

11、tation of four arms: Mode 1 beam maximum is on-axis of the tower (high-angle mode) with overhead maximum. Mode 2 beam maximum is off-axis of the tower (low-angle mode) with overhead null. Single Mode Operation (SM). The SPIRA-CONE will be permanently connected in either of the required modes at inst

12、allation. Switched Selective Mode Operation (SW). Single input switched mode is available. Switching is carried out at the balanced inputs of the SPIRA- CONE by means of relay contacts controlled by cable from a unit located at the control center. Full remote control systems are available. Dual-Mode

13、 Operation (DM). Each of the two separate modes of the SPIRA- CONE is activated simultaneously through a patented Broad Band Isolating Coupler (BBIC)*. The two port version of the BBIC permits simultaneous operation of two transmitters (or one transmitter and one receiver), limited in frequency only

14、 by the low frequency cut-off of each mode. The standard version activates on high angle and one low angle mode but an optional arrangement provides two simultaneous high modes. Switched 2 Port BBIC: This provides one high angle mode with a simultaneous selected high or low angle mode. Triple-Mode O

15、peration (TM). With a 3-port BBIC, two high angle modes are generated simultaneously with a low angle mode resulting in ability to transmit three simultaneously independent signals. SPIRA-CONE Geometry Faraday Rotation Effect 3 Methods of Transmitter/Receiver Interface Power Level Function Number Th

16、e result is a saving in land area for the DM and TM SPIRA-CONE antennas with respect to conventional antennas. Outstanding performance is achieved when the antenna is used as a receiving when the antenna is used as a receiving antenna. The ant-fading benefits of elliptical polarization are immediate

17、ly evident by the reduction in signal fading, which is equivalent to space or polarization diversity. Use of a dual diversity receiver fed through a two port receiving BBIC adds an additional reliability enhancement angle of arrival diversity to the existing polarization diversity inherent in both t

18、he high and low modes. Sizes Available Full Sized. Designed for main communication centers, the 3001 Series Antennas offer the highest efficiency and power gain required for worldwide omnidirectional use such as shore-to-ship services. Since the 3001 Series Antennas require no ground screen, their p

19、erformance exceeds that of vertically polarized monopoles which suffer significant ground losses. Typically, over poor soil, a gain advantage of 6-7 dBi can be expected. Elliptical polarization can further add to system performance. Compact. Compact models offer similar performance advantages in tru

20、ncated array designs which are terminated to extend low frequency cut-off beyond the natural unloaded frequency. Input power is limited by radiator size, insulators and terminations. These models will accept up to 5 kW average power per mode. The antennas differ in mounting arrangement and applicati

21、on. All are available with more option kits. 4 Type Frequency Range, MHz HF log-periodic, spiral, omnidirectional 3 models: 2/3.6-30 3/5.2-30 4/7.2-30 Power Rating, kW Polarization Input Impedance, ohms Up to 20 average, 40 peak Horizontal elliptical; can be installed for right of left rotation, as

22、required 50, coaxial input option VSWR Directivity, dBi Azimuth Plane Radiation Pattern Elevation Plane Radiation Pattern 2.0:1 maximum* 7 Omnidirectional Variable with frequency and mode selection Efficiency Wind Survival Rating, mph (km/h) Without ice With 0.5 in (12mm) Radial Ice Greater than 95%

23、 140 (225) 60 (100) Type Frequency Range, MHz HF log-periodic, spiral, omnidirectional 2.0-30 (high angle mode) 4.0-30 (low angle mode) Power Rating, kW Polarization Input Impedance, ohms Up to 5 average, 10 peak Horizontal elliptical; can be installed for right of left rotation as required. 50, coa

24、xial VSWR Directivity, dBi Azimuth Plane Radiation Pattern Elevation Plane Radiation Pattern 2.0:1 maximum* 7 nominal Omnidirectional Variable with frequency and mode selection Wind Survival Rating, mph (km/h) Without ice With 0.5 in (12mm) Radial Ice 3002A-36s 3002A-36HE 3003 3004 125 (200) 140 (22

25、5) 100 (160) 100 (160) 50 (80) 70(110) 50 (80)* 50 (80) Type Frequency Range, MHz HF log-periodic, spiral Mode 1 (High Angle) 2-30 Mode (Low Angle) 3.6-30 Power Rating, kW Input Impedance, ohms Up to 20 average, 40 peak per mode. Horizontal elliptical; can be installed for right or left hand rotatio

26、n, as required. 50, coaxial input option. VSWR Directivity, dBi Efficiency 2.0:1 nominal 7 Greater than 95% Roof Mounted (Series 3002A). The 3002A series antennas were designed for applications in which only roof top space is available, such as diplomatic services, security services and operational

27、headquarters. Elevation patterns are influenced by array height above the effective ground. The array is supported by six tubular poltruded fiberglass compression booms. It can also be ground mounted where space is at a premium. Transportable (Type 3003MT). The Type 3003MT is particularly suited to

28、applications such as emergency or transportable communications centers, in which its omnidirectional high and medium low angle elevation patterns provide communication on short to medium paths by skywave reflection. The elliptical polarization is especially effective when the distant terminal is mob

29、ile. Supported by a 70ft (21m) light weight, nested aluminum mast, the antenna can be deployed by a team in under two hours. An installation site of 75 ft (23m) radius is required. Fixed (Type 3004-70 and 3004-90). Electrically similar to the 3003 transportable, this fixed station model offers two a

30、rray heights supported by galvanized steel lattice masts of 70 or 90 ft (21 or 27m). This model provides a choice of elevation angles to match communication requirements; the 90 ft (27m) version offers lower angles necessary for longer distances. Characteristics, Series 3001-Full Sized Characteristi

31、cs, Series 3002, 3003 & 3004-Compact * With 0.25 in (6mm) Radial Ice * VSWR depends upon the influence of unknown adverse factors in built up areas, such as roof tops where they array may be installed. In the case of triple mode, operation VSWR is 2.0:1 nominal, 2.5:1 maximum. Characteristics, Serie

32、s 3005-2L 5 Azimuth Plane Radiation Pattern Elevation Plane Radiation Pattern Omnidirectional Mode 1 Beam Maxima 90 2 MHz 50 30 MHz Mode 2 Beam Maxima 45 4 MHz 10 30 MHz Wind Survival Rating, mph (km/h) Without Ice With 0.5 in (12mm) 150 (240) 90 (145) Type Frequency, MHz Power Rating, kW Switched,

33、dual and triple mode 2-30 See ordering information Input Impedance, ohms Isolation, dB Insertion Loss, dB 50, coaxial 30 nominal* 0.15 Tower Height, ft (m) Tower Base Diameter, ft (m) Guy Diameter, ft (m) 87 (26.5) 110 (33.5) 208 (63.5) Characteristics, Broad Band Isolating Couplers * Output ports t

34、erminated into matched loads. Series 3001 Full Sized Series 3003MT Transportable Series 3002A Roof Mount Low Profile (Type 3005-2L). With the same electrical performance characteristics as its single mast counterpart, this low profile, compact antenna is ideally suited for height restricted areas su

35、ch as airports or in areas where minimal ground is available. The antenna uses a full-sized apex down four arm conical logarithmic spiral with interleaved wire element radiators suspended from six peripheral, RF transparent, support structures. As the array is suspended from six dielectric halyards,

36、 raising and lowering of the antenna can be accomplished from ground level once the radiators have been disconnected from the BBIC, which sits on top of the center stub tower. Accessories The following accessories are available for ease of installation and maintenance: tower lighting kit, erection k

37、it, paint kit, lightning rod kit, anti-climbing kit, and spares kit. 6 Series 3004 Fixed Antenna Efficiency Compact Models Series 3005 Low Profile Typical Azimuth Radiation Pattern Full-Sized Series (Directive gain in dB below beam peak) Typical Elevation Plane Radiation Pattern Full-Sized Series 7

38、Elevation Plane Radiation Patterns Compact Series (Directivity, in dB below beam peak) 8 Type Number Mode 3001-2VL-(*) Very Low Angle 3001-2L-(*) Low Angle 3001-2ML-(*) Medium Low Angle 3001-3L-(*) Low Angle 3001-3ML-(*) Medium Low Angle 3001-4L-(*) Low Angle Tower Height, ft (m) Guy Radius, ft (m)

39、Freq. Range High-Angle Mode, MHz Freq. Range Low-Angle Mode, MHz 240 (73.2) 267 (81.4) 2-30 3.6-30 220 (67.1) 265 (80.8) 2-30 3.6-30 200 (60.9) 238 (72.5) 2-30 3.6-30 150 (45.7) 166(50.6) 3-30 5.4-30 130 (39.6) 157 (47.9) 3-30 5.4-30 120 (36.6) 135 (41.2) 4-30 7.2-30 4 MHz Upper Power Angle, deg. 4

40、MHz Beam Peak Angle, deg. 4 MHz Lower Power Angle, deg. 57 33 16 66 38 17 70 42 19 6 MHz Upper Power Angle, deg. 6 MHz Beam Peak Angle, deg. 6 MHz Lower Power Angle, deg. 57 33 16 68 40 18 8 MHz Upper Power Angle, deg. 8 MHz Beam Peak Angle, deg. 8 MHz Lower Power Angle, deg. 52 30 14 30 MHz Upper P

41、ower Angle, deg. 30 MHz Beam Peak Angle, deg. 30 MHz Lower Power Angle, deg. 15 10 5 15 10 5 31 20 9 15 10 5 31 20 9 15 10 5 Power Rating, kW Average Peak Single Mode (SM) Switched Mode (SW) Single Dual Dual Mode (DM) Triple Mode(TM) Input Connector Receive Only 1 5 Receive Only 2 10 -1 -1 -2 -21 -2

42、1 -22 - - - -30 -31 -32 - -41 - Type N Jack Type N Jack 7/8” EIA 10 25 20 50 -3 -4 -23 -24 -53 - -33 - - - 1-5/8” EIA 3-1/8” EIA Type No. Support Type Mounting Low Freq. High Angle Cut-Off MHz Low Angle Power Rating kW Average/Peak Height Ft (m) 3002A-36S-(*) 3002A-36HE-(*) Standard 125 mph, no ice

43、High Environment Roof or Ground Ground 2.0 2.0 4.0 4.0 5/10 5/10 36 (11) 36 (11) Ordering Information, Series 3001 * Append with Power Level Function Number from Series 3001 Option Table below. Series 3001 Option Number Table- Power Level Functions Ordering Information, Series 3002A Compact Series-T

44、ubular Boom Types * Append Power Level Function Number 3002, 3003 and 3004 below. Bulletin 1405E 05/08 Data subject to change without notice. 9 ASC Signal Corporation 606 Beech Street West Whitby, Ontario, Canada L1N 5S2 t. +1 (905) 668 3348 f. +1 (905) 668 8590 Type No. Support Type Mounting Low Fr

45、eq. High Angle Cut-Off MHz Low Angle Power Rating kW Average/Peak Height ft (m) 3003-70MT-(*) 3004-70F-(*) 3004-90F-(*) Transportable Fixed Fixed - Ground Ground 2.0 2.0 2.0 4.0 4.0 4.0 5/10 5/10 5/10 70 (21) 70 (21) 90 (27) Power Rating, kW Average Peak Single Mode (SM) Switched Mode (SW) Dual Mode

46、 (DM) Triple Mode (TM) Input Connector 1 5 2 10 -1 -2 -21 -22 -31 -32 -41 - Type N Jack 7/8” EIA Power Rating, kW Average Peak Single Mode (SM) Switched Mode Single (SW) Dual Dual Mode (DM) Triple Mode (TM) Input Connector 1 5 2 10 -1 -2 -21 -22 - - -31 -32 -41 - Type N Jack 7/8” EIA 10 25 20 50 -3

47、-4 -23 -24 -53 - -33 -34 - - 1-5/8” EIA 3-1/8” E/A Ordering Information, Series 3003 & 3004 Compact Series-Catenary Support Types * Append Power Level Function Number 3002, 3003 and 3004 below. Series 3002A, 3003 & 3004 Option Number Table- Power Level Functions Ordering Information Series 3005-2L-(

48、*)-Power Level Functions * Append Power Level Function Number from Series 3005 Option Table above. 1 2 3 4 5 6 7 Bulletin1405D4/00 Data subject to change without notice Printed in U.S.A. Copyright 2000 Andrew Corporation, Orland Park, IL U.S.A. 60462 Andrew Corporation 10500 West 153rd St. Orland Park, IL 60462 U.S.A. From North America: 1-8