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Beginner's Guide

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SWR: Standing Wave Ratio

HAM Radio - Beginner's Guide

Standing Wave Ratio

In telecommunications, standing wave ratio (SWR) is the ratio of the amplitude of a partial standing wave at an antinode (maximum) to the amplitude at an adjacent node (minimum), in an electrical transmission line.

The SWR is usually defined as a voltage ratio called the VSWR, for voltage standing wave ratio. For example, the VSWR value 1.2:1 denotes a maximum standing wave amplitude that is 1.2 times greater than the minimum standing wave value. It is also possible to define the SWR in terms of current, resulting in the ISWR, which has the same numerical value. The power standing wave ratio (PSWR) is defined as the square of the VSWR.

First Steps in Amateur Radio

HAM Radio - Beginner's Guide

If you are SWL or Amateur Radio Operator then basic information of Amateur radio with lots of articles links have been compiled by VU3PLP (OM Rajesh Kumar). Rajesh is a very active HAM Radio Operator and Electronic Hobbyist from Bhuveneshwar (Orissa).

We hope you would find the information listed here to be of immense use - and help you in your efforts to know more about this wonderful hobby in Radio Electronics. Should you have more information, or like to share your views, feel free to write in to us and we would be glad to publish information posted by you here on VU2.IN - Your own Ham Radio India Amateur Radio Website.

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Newsflash

Counterfeit Product Alert

Buyers of Icom equipment should be aware of counterfeit product alert issued by ICOM Inc.

Counterfeit products have become a serious concern for Icom. Icom continues to fight against counterfeits. Counterfeit products are hurting not only Icom’s business, but also authorized dealers’ and distributors’, and above all, users are the number one victim. Counterfeit products are often sold at very low price, but of inferior quality and performance.

Using fake transceivers, battery packs and chargers may even cause safety problems including the risk of fire hazards.

Ham Radio India Discussion Board for Amateur Radio Operators

Topic	Author	Category	Date
Re:Digital SWR Power meter	vu3plp	Test Equipment	25-03-12 12:13
Special Event Callsigns - ARDF 2012 Cha...	VU2GTI	Special Events	25-01-12 23:20
16th IARU WORLD ARDF Championships	VU2GTI	Contests	25-01-12 23:11
ASOC license wishlist	VU2GTI	Ragchew	25-01-12 02:28
4U1WRC Event Callsign for WRC Meeting i...	VU2GTI	Special Events	23-01-12 22:45
Contests This Weekend - 21 & 22 Jan 2012	VU2GTI	Contests	19-01-12 03:59
HRN 2012 January Issue is now available	VU2GTI	Clubs & Societies	18-01-12 05:09
9M4CNY - Celebrating Chinese New Year	VU2GTI	Special Events	16-01-12 01:46
International Museums Weekend special event	VU2GTI	Special Events	14-01-12 21:14
Special callsign to mark Danish preside...	VU2GTI	Special Events	14-01-12 21:12

Amateur Radio in India is still in it's nascent stage. The aim of VU2.IN is to educate people about the role of Ham Radio, introduce them to amateur radio and guide new comers in this fascinating hobby of ham radios. Ham Radio India is Hams website for Radio Amateurs. Resources like callsign database and features like News on amateur radio, photos, circuits, articles, downloads, message boards and discussion forums. We also have a section for commercial broadcast looking at popular and cool FM Radio Stations in India apart from insights on other Medium Wave (MW) and Short Wave (SW) transmission from across the globe. If you have feeback or comment please write in to us. The information is shared in public domain and is often aquired from various sites and search engines, thus please check for copywrite violation, or seek permission to reproduce / reprint the content on this site. If you would like to bring any such article to our attention, we we would take it off from this HAM Radio Website.