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s pe - 11 - 8 - 033/ h /ss page 1 of 15 specification part no. : wlp.2450.25. 4 .a. 02 product name : 2450mhz patch antenna features : 5dbi peak gain pin type automotive ts16949 production and quality approved 25 * 25 * 4 .5 mm rohs compliant photo :
s pe - 11 - 8 - 033/ h /ss page 2 of 15 1. i ntroduction this wlp .25 patch antenna for ism, wi - fi, bluetooth and zigbee is based on smart xtremegain ? technolog y. it is mounted via pin and double - sided adhesive and has been selected as optimal solution for the 50* 5 0mm ground plane. this passive patc h offers typical gain response from 2.5 dbi and a higher gain can be achieved, depending on the ground plane, the space available and clearance afforded. the wlp .25 s high gain performance is a perfect solution for metering and remote monitoring applicatio ns; it can deliver longer range than smaller chip antennas. 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 per formance. 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 specif ication 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 t he antenna must have less than 2dbi peak gain, but you dont 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 gai n 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 t aoglas 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.
s pe - 11 - 8 - 033/ h /ss page 3 of 15 2. key antenna performance indicators original patch specification tested on 50 *50 mm ground plane no parameter specification notes 1 center frequency 2482mhz with 50 *50mm gnd plane 2 bandwidth 85 mhz min return loss - 10db 3 vswr 2.0 max center frequency 4 gain at zenith +5.0dbi c typ. center frequency 5 gain at 10 elevation - 1.0dbi c typ. center frequency 6 axial ratio 3 db max center frequency 7 polarization broadly linear 8 impedance 50? 9 frequency temp coefficient (tf) 020ppm/c - 40c to +10 5c 10 operating temperature - 40c to +105c * chang es in user groundplane and environment will have an effect on the antennas performance
s pe - 11 - 8 - 033/ h /ss page 4 of 15 3. mechanical specifications 3.1 dimensions and drawing
s pe - 11 - 8 - 033/ h /ss page 5 of 15 3.2 layout dimensions
s pe - 11 - 8 - 033/ h /ss page 6 of 15 3.3 ground plane dimension
s pe - 11 - 8 - 033/ h /ss page 7 of 15 3.4 test fixture antenna & performance measurements
s pe - 11 - 8 - 033/ h /ss page 8 of 15 4. performance measurement 4.1 antenna s11 (return loss) 4.2 vswr
s pe - 11 - 8 - 033/ h /ss page 9 of 15 4.3 antenna smith chart (impedance)
s pe - 11 - 8 - 033/ h /ss page 10 of 15 4.4 efficiency
s pe - 11 - 8 - 033/ h /ss page 11 of 15 4.5 antenna gain xz plane yz plane
s pe - 11 - 8 - 033/ h /ss page 12 of 15 xy plane
s pe - 11 - 8 - 033/ h /ss page 13 of 15 5. packaging per tray: 50 pieces per carton(inside box) C 4 trays = 200 pieces outer carton (outside box) C 4 cartons = 800 pieces 50 pieces per tray 4 tray s per carton
s pe - 11 - 8 - 033/ h /ss page 14 of 15
s pe - 11 - 8 - 033/ h /ss page 15 of 15 taoglas makes no warranties based on the accuracy or completeness of the contents of this documen t and reserves the right to make changes to specifications and product descriptions at any time without notice. taoglas reserves all rights to this document and the information contained herein. reproduction, use or disclosure to third parties without express permission is strictly prohibited. copyright ? taoglas ltd.

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