SPE-11-8-146/K/SS

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1. Introduction

The WLA.01 2.4GHz Loop antenna is a high efficiency, miniature SMD, edge mounted ceramic

antenna for very small space requirements for Wi-Fi, WLAN, Zigbee, Bluetooth, and 802.11

applications. The WLA.01 uses the main PCB as its ground plane, thereby increasing Antenna

Efficiency. It is tuned for different PCB sizes by simply changing the value of the matching

circuit. At 3.2mm*1.6mm*0.5mm, the WLA.01 is one of the smallest antennas available

worldwide. This antenna is delivered on tape and Reel.

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.