Microwave Forum

richy_64 · Administrator Messages: 198

I purchased a bluetooth access point for use with my pda (internet/mail access

). It´s a LAN-Bluetooth bridge.

Unfortunately the range isn´t very high, and the data rate decreases fast when the are one or two stone walls in the way.
Ok, bluetooth technology isn´t designed for that.---

Hmm, i don´t like the internal antenna...

Perhaps i can build a bi-quad or something else...

Other suggestions...?

Greetings,
Richard

_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

a simple l/4 antenna... 0dmi

because the microstrip offer bad gain,,,,!!!

what class...?

1mW
2.5mW
100mW

rf power over 30mW ... only with adaptive power gegulation loop circuit!

ps. new topic... great!!!

richy_64 · Administrator Messages: 198

I build a bi-quad for my bluetooth device (class 2), of course it works much better

Instead of showing the picture of my antenna, i show an artice of ´Rothammels Antennenbuch´. It delivers much more interesting details about the antenna, but... only in german, sorry. For those who want to build such an antenna, you can find wlan-bi-quads 1001 times in the internet...

_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."

kleiner-onkel · Administrator Messages: 412 Location: South-West-G

Hi Richard...

years ago i have build a 1800Mhz DECT quad...
It works great... but i prefer waveguids....

quad's works great with old sat dishes...!!!

here some pic's

gr.chris

richy_64 · Administrator Messages: 198

Zitat: kleiner-onkel

quad's works great with old sat dishes...!!!

I know...
they are good for audio microphones, too

_______________________

"Ich liebe es, wenn ein (Schalt-)Plan funktioniert."