|
|
Alison Microwave Ltd. Designer and manufacturer of robust-high-performance GPS antennae and ancillaries
|
|||
|
||||
|
Telephone: +44 (0) 1493 332 068 Facsimile: +44 (0) 1493 332 710
Co.Reg. in England & Wales No.1976804 |
|||
4. Iridium and RBGAN satellite antennae
-
AML active antennae for GPS and DGPS reception incorporate hard anodised milled aluminium bases with 4mm thick GRP radomes, giving strength and superb corrosion resistance. Titanium bases with glass radomes are used for the deep sea submersible antennae, which are produced in partnership with Nautilus Marine Service GmbH.
-
The antennae elements are either dielectric patches or crossed dipoles optimised in conjunction with their radomes. The elements are matched and have right hand circularly polarised (RHCP) radiation patterns that are uniform in azimuth and offer good reception down to 5 degrees in elevation.
-
Standard antennae can be rendered inoperable due to interference close to the GPS and DGPS frequencies, a problem that will arise increasingly as the RF spectrum becomes more crowded. AML manufacture ranges of antennae with integral low-loss comb and interdigital filters, which are significantly better at suppressing near band interference than those with standard ceramic filters.
-
Each antenna has a low noise amplifier with an overall noise figure including filters of less than 3dB and a factory preset gain in the range 20 to 45 dB. Supply voltage is 3.3V to 20Vdc at typically 35mA. Other gains are available on request.
-
An independent evaluation of AML’s L1/L2 range of interdigital filtered antennae obtained decimetre precision using a high precision DGPS spot-beam service, a performance that compares favourably with those of antennae from other manufacturers. (Interdigital filters assist continuity of DGPS reception during high precision measurements).
-
All antennae are EMC approved, compatible with a wide range of GPS/DGPS receivers and tested against an appropriate reference model prior to dispatch.
-
JP614460-01 certification for selected antennae (AD410, AD420, AD490) representative of mechanical, filter and amplifier configurations used across full product range.
-
AML antennae are designed and manufactured in house using state-of-the-art facilities. Consequently, custom requirements ranging from modification of existing products to the development of new antennae can be met efficiently.
|
Description |
Filter |
Pass-band (MHz) |
Model |
|
GPS antennae (for reception at 1575.42 MHz) |
|||
|
Ceramic |
1575.42 (centre) |
|
|
Ceramic |
1575.42 (centre) |
|
|
Interdigital |
1570-1580 |
|
|
Ceramic |
1575.42 (centre) |
|
|
|
|
|
|
Comb |
1530-1560 |
|
|
Interdigital |
1530-1541 |
|
|
Comb | 1530-1560 | AD316/3060 |
|
|
|
|
|
Comb |
1530-1580 |
|
|
Dual Interdigital |
1531-1541 1570-1580 |
31417080 |
|
Comb |
1530-1580 |
AD480/3080 |
|
Comb | 1530-1580 | AD316/3075 |
|
|
|
|
|
Comb |
1570-1610 |
|
|
|
|
|
|
Ceramic |
1227.6, 1575.42 (centres) |
|
|
Ceramic |
1227.6, 1575.42 (centres) |
|
|
|
|
|
|
Dual interdigital |
1222-1232 1530-1580 |
|
|
Triple interdigital |
1217-1254 1530-1541 1558-1611 |
|
|
|
|
|
|
Drone antenna with integrated receiver and UHF radio modem. The antenna element acts as both a receiver for GPS and a tuned transmitter for the radio modem at 458 MHz with no compromise to its electrical performance at either frequency. |
Dual interdigital |
1531-1541
1570-1580 |
|
|
Antenna for use with external DGPS/GPS receivers and a UHF radio modem. The L-band and UHF frequencies are multiplexed enabling connection to the antenna with a single coaxial cable. An optional splitter is used to separate the signals at the receivers. |
Dual interdigital |
1531-1541 1570-1580 |
AD500 |
|
Antenna for use with external DGPS/dual frequency L1/L2 GPS receivers and a UHF radio modem. The L-band and UHF frequencies are multiplexed enabling connection to the antenna with a single coaxial cable. An optional splitter is used to separate the signals at the receivers. |
Triple interdigital |
1222-1232 1531-1541 1570-1580 |
AD540 |
|
Antenna for use with external GPS receiver, with low frequency (1.6 to 3.2 MHz) DGPS beacon reception and a UHF radio modem. The L-band, UHF and low frequencies are multiplexed enabling connection to the antenna with a single coaxial cable. An optional splitter is used to separate the signals at the receivers. Build and appearance identical to AD500
|
Ceramic (Interdigital optional) |
1575.42 (centre) |
AD530 |
|
|
|
|
|
Specification as AD440, with 2.4 GHz antenna. Antenna for use with external DGPS/L1 GPS receivers and a 2.4-2.483 GHz modem. The frequencies are either multiplexed enabling connection to the antenna with a single coaxial cable, or a separate connector can be provided for 2.4GHz . An optional splitter is used to separate the signals at the receivers.
|
|
||
|
Specification as AD490, with 2.4 GHz antenna. Antenna for use with external DGPS/ L1/L2 GPS receivers and a 2.4-2.483 GHz modem. Options as above.
|
|
Disclaimer: This site provides a summary of AML products available from March 4th 2008 and may contain errors. Please contact AML for confirmation and prices.
Privacy Statement: All email correspondence is stored until deleted on the company's network provider's server, and the associated email addresses are used solely for communication with the original correspondents. All correspondence is treated as confidential and no information is passed onto third parties without the express permission of the original correspondents.