Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Anritsu Alliance Test Equipment Amplifier Solutions Anatech Electronics Axiom Test Equipment Berkeley Nucleonics Bittele Centric RF Conduct RF Copper Mountain Technologies Empower RF everything RF Exodus Advanced Communications Innovative Power Products ISOTEC KR Filters Lotus Systems PCB Directory Rigol RF Superstore San Francisco Circuits Reactel RFCT TotalTemp Technologies Triad RF Systems Windfreak Technologies Withwave LadyBug Technologies Wireless Telecom Group Sponsorship Rates RF Cafe Software Resources Vintage Magazines Thank you for visiting RF Cafe!
Amplifier Solutions Corporation (ASC) - RF Cafe

GSM 1900 Patch Antenna help - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2010 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. Regardless, there are still lots of great posts in the archive that ware worth looking at. Below are the old forum threads, including responses to the original posts.

NOTICE: The original RF Cafe Forum is available again for reading, and the new RF Cafe Blog is an active board.

-- Amateur Radio

-- Anecdotes, Gripes, & Humor

-- Antennas

-- CAE, CAD, & Software

-- Circuits & Components

-- Employment & Interviews

-- Miscellany

-- Swap Shop

-- Systems

-- Test & Measurement

-- Webmaster

Marc_in_NoCal
 Post subject: GSM 1900 Patch Antenna help
Posted: Tue Mar 18, 2008 6:50 pm 
 
Lieutenant

Joined: Tue Mar 18, 2008 6:39 pm

Posts: 2

Hi,

I am looking to buy this Patch Antenna for my AT&T wireless cellphone:

http://www.hyperlinktech.com/web/1.9ghz ... a_8dbi.php

but, I know that ATT goes down to 1850, but this Antenna is spec'ed to 1880.

does anyone know this Antenna is OK for ATT's high band GSM?

Or if not, does anyone has a suggestion on similar Patch Antennas that would work for ATT's high Band GSM service?

thanks in advance for any information,

Marc
 
   
 
RFBites
 Post subject:
Posted: Sun Mar 23, 2008 6:30 pm 
 
Lieutenant

Joined: Sun Mar 23, 2008 5:59 pm

Posts: 2

Location: Lafayette, CO

Hi Marc,

You might want to request the VSWR or Return Loss plots for this antenna from 1850 - 1990MHz from HyperLink. My guess is that the return loss starts to get bad at the lower frequency, which translates into a poor match for your power amplifier. At it's worst, a poor match could cause your power amplifier to fail due to a high VSWR. Other than that, you will start to loose gain, and have a power mismatch between your uplink and downlink.

Just a hunch, but if Hyperlink had the ability to spec this antenna down to 1850, I'm sure they would have done it, or they are really missing a good market.

You may want to keep shopping around.

Best Regards,

_________________

RF Bites

http://www.rfbites.com

Roll your own filter today!
 
   
 
nubbage
 Post subject:
Posted: Tue Mar 25, 2008 6:06 am 
 
General
User avatar

Joined: Fri Feb 17, 2006 12:07 pm

Posts: 218

Location: London UK

A simple patch antenna only has a bandwidth (VSWR <= 2:1) of 2%.

There are ways to broaden this by overlaying patches that are isolated electrically, and using resonant apertures etc, but I do not believe Hyperlink equipment incorporates these ideas (yet) as standard.
 
   
 
Marc_in_NoCal
 Post subject: thank you very much for these information. [nt]
Posted: Wed Mar 26, 2008 3:29 pm 
 
Lieutenant

Joined: Tue Mar 18, 2008 6:39 pm

Posts: 2

...

Posted  11/12/2012
everythingRF RF & Microwave Parts Database (h1) - RF Cafe
Copper Mountain Technologies (VNA) - RF Cafe
Axiom Test Equipment - RF Cafe
TotalTemp Technologies (Thermal Platforms) - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free
 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com