ZT-180 My Wifi MOD

Here is my Wifi MOD

MY ZT-180 is the old RUBY 1.3 mother boards. These came with a RT2070 wifi module that uses a microstrip PCB antenna.

Possibly due to the mismatch of this chip antenna, the Module produces a lot of heat that results in repeated disconnets from the AP. Also the reception is very poor due to bad antenna design.

A lot of methods exist to improve the antenna recption. The way I did it was using a http://www.antennafactor.com/products/embeddable/chp-series-chip-antennas/  2.4 GHZ chip antenna that I already had with me.

Data sheet http://www.antennafactor.com/resources/data-guides/ant-xxx-chp-x.pdf
http://en.wikipedia.org/wiki/Whip_antenna
http://en.wikipedia.org/wiki/Monopole_antenna

 1. remove microsd card
2. open ZT-180
3. disconnect battery
4. Now as shown in PIC below, remove the capacitor, solder coax core and then shield. Avoid the shield touching the pad in the centre of the semicircles.

5. Use a copper tape of about 40x20cm and put it on a card. Use this as ground plane. Solder the shield on the antenna end of coax to the tape. Solder the antenna directly to the coax core on antenna end.
Cover coper tape with paper masking tape to avoid shortcircuit to other components in the tablet.