Open Boundary Quad-Ridged

Open Boundary Quad-Ridged Horn Antenna Applications:

• - Low Cross-interference 
• - Antenna Measurement
• - Electromagnetic Measurement
• - Electromagnetic Compatibility Testing (EMC test)
• - Ultra-wideband Radar Detection
• - Some antennas have a compact design that makes them ideal for use with a tripod-mounted -

Trouble phenomenon

WiFi can be turned on, but the signal is weak. It has no signal when being away from the router.

Repair Process

After power on test only one or two WiFi hotspot can be found and the signal is weak, but trouble-free iPhone can search more than ten hotspots. Therefore, the trouble can be considered as weak signal.

After disassembling, the WiFi chip is found to be replaced. In order to test whether the chip is workable, using an accessory antenna to replace the peripheral antenna circuit of the chip. The way is to use a 10 cm enameled jump wire  acting as antenna starting from C5213_RF near WiFi, as shown in below picture 1-1.

Picture 1-1

Turning on iPhone again after finish the above steps, many WiFi hotspots can be found now. At the same time, the signal has been normal. This is mainly because the WiFi signal filter FL_CELL_WIF_RF has been damaged. But the removal of filter has no effect on the iPhone operation. In the case of repair, we often use the enameled wire directly ignoring the filter chip .

As is shown in the PBC picture 1-2.

picture 1-2

The material object picture of placing the enameled jump wire is shown inpicture 1-3.

After smearing the enameled wire with UV Solder Resist and assembling test, the signal becomes normal. The trouble is removed.

picture 1-3

If you need more useful phone fix information please contact vipfixphone.

Fei Teng Wireless Technology Co. Ltd

Taiwan Head Office & Manufacturer:

No.369, Sec. Litoushan, Wenshan Rd., Xinpu Township, Hsinchu County 305, Taiwan (R.O.C.) MAP

Tel:  886-3-5882899

Fax: 886-3-5882879