SPE-13-8-007/H/SS

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1. Introduction

This 12*12*4mm high gain 2.4GHz patch antenna is ideally suited for high performance

industrial applications in the 2.4GHz Wi-Fi, ISM, and Zigbee bands. This product has highest

gain in the XZ (azimuth) plane direction, most suitable for fixed wireless applications where

transmission and reception is focused to one hemisphere of the device, for example a wireless

meter on a reinforced concrete wall. It can also be placed anywhere on the device ground-

plane, unlike most chip or loop antennas which need to be edge mounted.

Many module manufacturers specify peak gain limits for any antennas that are to be

connected to that module. Those peak gain limits are based on free-space conditions. In

practice, the peak gain of an antenna tested in free-space can degrade by at least 1 or 2dBi

when put inside a device. So ideally you should go for a slightly higher peak gain antenna

than mentioned on the module specification to compensate for this effect, giving you better

performance.

Upon testing of any of our antennas with your device and a selection of appropriate layout,

integration technique, or cable, Taoglas can make sure any of our antennas’ peak gain will

be below the peak gain limits. Taoglas can then issue a specification and/or report for the

selected antenna in your device that will clearly show it complying with the peak gain limits,

so you can be assured you are meeting regulatory requirements for that module.

For example, a module manufacturer may state that the antenna must have less than 2dBi

peak gain, but you don’t need to select an embedded antenna that has a peak gain of less

than 2dBi in free-space. This will give you a less optimized solution. It is better to go for a

slightly higher free-space peak gain of 3dBi or more if available. Once that antenna gets

integrated into your device, performance will degrade below this 2dBi peak gain due to the

effects of GND plane, surrounding components, and device housing. If you want to be

absolutely sure, contact Taoglas and we will test. Choosing a Taoglas antenna with a higher

peak gain than what is specified by the module manufacturer and enlisting our help will

ensure you are getting the best performance possible without exceeding the peak gain limits.