SPE-11-8-129/F/NB

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1. Introduction

The SDWA.01 dual-band SMT ceramic antenna is an embedded, high efficiency, high

peak gain solution for Wi-Fi 802.11n and other ISM band applications which require high-

speed data rates and wide coverage areas. Designed for the 2.4 GHz and 5 GHz bands,

the antenna delivers a peak gain of 3.5 dBi and 4.2 dBi, respectively. The antenna

features excellent efficiency > 70% in both bands. It is designed to perform optimally

mounted in the corner of a device PCB. Two SDWA.01 antennas can be used for MIMO

applications. The antenna's low profile, at only 1.5mm, allows for use on extremely thin

devices while still maintaining excellent performance characteristics. This antenna is

delivered on Tape and Reel for SMT application.

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