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Next G, CDMA, GSM Antennas: Getting a better signal for your mobile phone and wireless card   Minimize
Location: BlogsGeneral Blog    
Posted by: petermartin Sunday, 24 September 2006
wireless mobile phone and wireless card, Next G, CDMA, GSM antennas

Next G, CDMA, GSM Antennas: Getting a better signal for your mobile phone and wireless card

There are a range of antennas which can be used to improve signal strengths.

TC1306.JPG 

Above is the TC1306 and probably solves 90% of reception problems. Just type TC1306 into the CAT search box on our home page or click on to see this on the shopping cart. http://www.rfshop.com.au/Default.aspx?tabid=426&txtSearch=tc1306&List=1

If you need something with more gain:

yagi04MI.JPG

In addition to an antenna you'll also need a patch lead (pigtail lead, adaptor lead) to connect to your particular phone:

There are so many different types of adaptor lead that we can't show them all on our website. You'll need to give us the model number of your phone or card by email. The term 'Telstra card' or 'Vodaphone Card'  is not so useful  becuase there is more than one possibility. Instead, if you tell us its a Sony Ericsson GC75 ,  Maxon MM-550C, Sierra Air card 580, Next G  or whatever,  it saves time and increases the chances of you ending up with the right thing. If you can't find the model number a digital photo attched to an email is usually enough for us to idetify it.

With the right pigtail you can then attach it to a range of different types of antenna. Usually these antennas have leads which are terminated in leads which have FME female connectors. Pigtails have leads which fit into the phone at one end and a FME male, usually,  on the other. So, usually, things match up,  but if not we can change connectors at a cost of apprx $10 per change.

Cellutronics in NZ have a good range of products on their website http://www.cellutronics.co.nz ; many of which we've purchased ourselves, so we should be able to supply the same things.

Using a Passive Repeater

If you are in an area with very good coverage but cannot receive a signal inside a building because it cannot penetrate the roof and walls, the problem can often be solved by using a passive repeater. A passive repeater is just two antennas connected with a cable. The first antenna picks up the signal, passes it down the cable and the second antenna re-transmits it. Unlike active repeaters, the usage of which requires the permission of the spectrum owner, and is difficult and expensive to obtain, passive repeaters can be installed quite legally.

Outside the building you would use a high gain antenna such as:

yagi.jpg 

You'd need to have a good LOS to a local Basestation for this to pick up sufficient signal:

and inside the building a much smaller antenna such as:

RASMAM-120.JPG

We would probably need to adjust the length of the cables, change the connector to suit, and provide a wall plate to pass the cable through. Please contact us for a quote on this. The total cost would be about $130 +GST + freight.

Customer Feedback:
" Initally it all didn't look too good until I found a tower line of sight, a couple of kilometres away behind a tree. Other towers are nearer, but behind hills.  Elsewhere on the premises we get full signal on all GSM phones except for one blackspot due to concrete walls. The repeater now gives at least two 'bars' signal on mobiles within around a ten metre radius of the indoor antenna.That makes for a very happy Production Manager who now no longer has to leave his desk to take/make mobile calls."  Nick Kelly IT Manager Lovitt Technologies Australia

Note: You really need a good strong signal outside your building to make a passive repeater work. Otherwise you'll need a direct connection to your phone. Its always a good idea when ordering a passive repeater to also make sure that you have the right cables for a direct connection to your phone, as a fall back option , in case the outside signal level is not strong enough for the passive repeater to work properly. A  mobile phone, like a TV set,  works much better when there is a direct connection  to the antenna.

 

If you'd like  a more professional antenna: Use this AY16-LA-641-CDMA/3G/Next G     Yagi antenna.

30mroll.JPG

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Comments (1)  
Re: Next G, CDMA, GSM Antennas: Getting a better signal for your mobile phone and wireless card    By watsonb@virginbroadband.com.au on Tuesday, 1 January 2008
I have a Motorola Telstrs 850 V6 Maxx Mobile Phone on Next G.
I work on Barrow Island and wondered if you had a good Hi Gain antenna that would be suitable.


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