/tags/rf/ Recent content in RF on Maj mechatronics Hugo -- gohugo.io en-us Fri, 16 Dec 2022 20:09:52 +0100 /posts/diy-1000mw-2.4ghz-rf-amplifier/ Fri, 16 Dec 2022 20:09:52 +0100 /posts/diy-1000mw-2.4ghz-rf-amplifier/ BOM and gerber files now avalible: s52mp/OpenRcAmp SKY65162 I designed a low cost 2.4ghz RF Amplifier based around SKY65162-70LF. The SKY65162 offers wide frequency operation range and is suited for both 900mHz and 2.4gHz both very popular in the RC comunity. The RF amplifier IC is a 400 to 3800 MHz Linear Power Amplifier that can output up to 30.0 dBm with 20.0 dBm gain. Schematics I created the chematics based on amplifiers typical aplication which also offers component values for its operation bands and than designed a 4 layer pcb following the manufacturers sample design found in the data sheet. <h2 id="bom-and-gerber-files-now-avalible-s52mpopenrcamphttpsgithubcoms52mpopenrcamp">BOM and gerber files now avalible: <strong><a href="https://github.com/s52mp/OpenRcAmp">s52mp/OpenRcAmp</a></strong></h2> <h1 id="sky65162">SKY65162</h1> <p>I designed a low cost 2.4ghz RF Amplifier based around SKY65162-70LF. The SKY65162 offers wide frequency operation range and is suited for both 900mHz and 2.4gHz both very popular in the RC comunity.</p> <p>The RF amplifier IC is a 400 to 3800 MHz Linear Power Amplifier that can output up to 30.0 dBm with 20.0 dBm gain.</p> <p><img src="/img/amp1.jpg" alt="" title=""></p> <h1 id="schematics">Schematics</h1> <p>I created the chematics based on amplifiers typical aplication which also offers component values for its operation bands and than designed a 4 layer pcb following the manufacturers sample design found in the data sheet.</p> /posts/cloverleaf-antenna/ Fri, 18 Feb 2022 00:00:00 +0000 /posts/cloverleaf-antenna/ I made a Heavy duty DIY FPV cloverleaf antenna using 3d printed parts to help the antenna hold its shape and survive heavy FPV bando bashing. The antenna is constructed with 0.8mm copper wire pushed inside individual 3d printed petals of the cloverleaf. The petals are than glued to a unibody holder which holds them in place where they can be soldered to the coaxial cable. The petal and body are all glued together with CA glue. <p><img src="/img/cloveleaf2.jpg" alt="" title=""></p> <p>I made a Heavy duty DIY FPV cloverleaf antenna using 3d printed parts to help the antenna hold its shape and survive heavy FPV bando bashing.</p> <p>The antenna is constructed with 0.8mm copper wire pushed inside individual 3d printed petals of the cloverleaf. The petals are than glued to a unibody holder which holds them in place where they can be soldered to the coaxial cable.</p> <p>The petal and body are all glued together with CA glue. The base is held on the coaxial cable only by friction but a layer of heat shrink tube can be used for added fixturing.</p> <p>Stl files for 3d printing can be downloaded here: <a href="https://www.thingiverse.com/thing:5252896">https://www.thingiverse.com/thing:5252896</a></p> <p>A quick SWR sweep show that the antenna is properly tuned for the desired band of 5.8 Ghz</p> <p><img src="/img/cloveleaf3.jpg" alt="Top view" title="Top view"></p>