# Module dimensional drawings

**URL:** <https://forums.digi.com/t/module-dimensional-drawings/486>\
**Category:** XBee - Zigbee\
**Created:** [April 6, 2009, 3:06pm UTC](https://forums.digi.com/t/module-dimensional-drawings/486 "2009-04-06T15:06:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![GregNelson](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@GregNelson](https://forums.digi.com/u/GregNelson)\
**Post date:** [April 6, 2009, 3:06pm UTC](https://forums.digi.com/t/module-dimensional-drawings/486/1 "2009-04-06T15:06:24Z")

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The manual for these modules has two drawings: “OEM RF Modules (antenna options not shown)” and “RPSMA variant.”  
After quite a bit of searching, I still can’t find drawings of the modules with the various antenna options. Are such drawings available?

I’m trying to evaluate which of these would work best in a space-constrained application, but we want to use one of the pre-configured antennas rather than adding our own.

Thanks,  
Greg

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**Author:** ![Rocker1446](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/rocker1446/32/21_2.png) [@Rocker1446](https://forums.digi.com/u/Rocker1446)\
**Post date:** [April 7, 2009, 4:32pm UTC](https://forums.digi.com/t/module-dimensional-drawings/486/2 "2009-04-07T16:32:40Z")

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The XBee module is offered with a wire whip antenna that is great for limited-space situations. The whip is a 1/4 wave antenna and thus needs a ground plane to be most effective. Normally the modules acts as the ground plane, but this can change if the wire is bent at a different angle. This must be taken into consideration. How are you planning to position the module and what orientation will the antenna have to the ground plane (module)?