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RF/Microwave  

Monopole antennas ups PCB space by 67%

Posted: 15 Feb 2010     Print Version  Bookmark and Share

Keywords:monopole antenna  Zigbee  interface  radio 

Pulse monopole antennas

From Pulse comes a set of monopole antennas that deliver Zigbee 2.4GHz and ISM bands 868MHz, 915MHz and 2.4GHz. The antennas provide a high-quality radio interface for multipurpose machine-to-machine devices and applications such as data loggers, remote control, tracking, monitoring, smart grid, automated meter reading, tags, remote keyless entry, industrial, metering, security, automation and point-of-sale.

These antennas are ideal alternatives to using trace antennas because they occupy very little PCB space while maintaining their key properties regardless of changes to the board.

The monopole family of ceramic antennas comprises the W3000, W3014, W3016 and W3043. Due to their small size they are suited to solutions where PCB size is limited for the antenna. Compared to a PCB antenna, the high temperature ceramic material used in the monopole family means they detune less due to human tissue proximity or device mechanics, making them a suitable choice for handheld or body-worn products. Further, these antennas can be used for multiple functions because their operating frequencies can be changed simply by implementing different matching circuits.

The smallest antenna is the W3043 at 3.2mm x 1.6mm x 1.1mm with a weight of 33mg. It is matched to 2.4GHz or other frequencies. The W3000, also compact, measures only 7mm x 1.6mm x 1.6mm and weighs 86mg. It's used for 2.4GHz and ISM band 868. With clearance, these antennas measure 66mm² (11mm x 6mm). Compared to a typical 2.45GHz FR-4 trace antenna which measures 200mm² (20mm x 10mm), the company's monopole antennas deliver 67 per cent more board space. Thus, a smaller device can be designed or space freed up for other components, and PCB costs are reduced.

The W3014 is a 10mm x 3.2mm x 1.5mm chip with a weight of 240mg. It uses ISM band 915 so it can be used for designs containing a suitable matching circuit. On the other hand, the W3016 is designed for ISM band 868 and is 10mm x 3.2mm x 4mm with a weight of 600mg.

All Pulse monopole antennas are RoHS-compliant and fully compatible with surface mount devices.

- Jean-Pierre Joosting
Microwave Engineering





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