Here is a brief summary of some of the antennas most commonly used for radio data modem installations, that we keep in stock. Further details of this equipment can be viewed by selecting from the first set of buttons or by clicking on the antenna name below. XL are always pleased to discuss your application and to offer advice on which antenna is the most suitable for your application.  Remember if you need range, you will need to sight the antenna as high as possible to get it into free space. 

The Standard Quarter Wave is suitable for direct connection to the radio modem for internal use and for the attachment to a waterproof housing for external use.

The Pole Mount/Desk Mount antennas main feature is that it will radiate the signal in a downward direction as well. Can easily be mounted in an elevated position to maximize distance

The Magnetic Mount quarter wave antenna is suitable for temporary vehicle mount applications. The antenna is supplied with a 5m RF cable and fitted with a TNC connector

The Quarter Wave Surface/Body mount antenna is suitable for permanently mounting on a vehicle and is supplied with a 3m RF cable fitted with a TNC connector.

Marine Quality Dipole is a unity gain real all weather dipole. Will stand marine and most other hostile environments and easily mounted on a scaffold pole to gain extra elevation and thereby improve distance. It is considered to be one of the best unity gain dipoles on the market and is suitable for most base station installations

The 869MHz antenna has been recently added to the range to cater for the latest Satel released modem to be used in the European market place.

3db gain antenna - potentially boosting the power of a 10W Epic to 20W ERP this must comply to OFCOM licence regulations

6db gain antenna - potentially boosting the power of a 10W Epic to 40W ERP this must comply to OFCOM licence regulations

Antenna Cables  In order to place your antenna in the prime location i.e as high as possible and in free space, XL can provide low loss cable with suitable connectors to your specification.

This is a useful too to calculate loss incurred from long cable runs http://www.timesmicrowave.com/cgi-bin/calculate.pl

Simple explanation of DBD V DBI

If you can imagine looking at an antenna from the side and ‘seeing’ the RF field that is generated it would look like the patterns shown below.

You can see the (Gain) difference in dBi verses dBd. Also you can see the pattern shape when using a Yagi and the gain in one direction.