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Antenna and its typesSite.ANTENNAANDITSTYPES HistoryHide minor edits - Show changes to markup October 03, 2014, at 08:52 AM EST
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O4gSd1? , [url=http://bglvjropcuii.com/]bglvjropcuii[/url], [link=http://agvjbhfweibp.com/]agvjbhfweibp[/link], http://giztudykxijt.com/ to:
(:title Antenna and its types :)
Material of antenna
RADIO JOVE uses a dipole antenna which is made up of copper wire.Even a single piece of wire acts as an antenna.We can simply try to listening disturbances at SW receiver using a long piece of wire wrap with aluminium foil. DIPOLE ANTENNA FOR RADIO TELESCOPE
Wavelength = speed of light/frequency
For Radio Jove we chose 20.1mhz as our antenna operating frequency after considering the fact that the bursts occurring in the outer celestial bodies( eg all planets) emits radio waves broadly on all frequencies but till 15mhz all radio waves get absorbed by the ionosphere layer in our atmosphere and it start coming on earth from 18mhz but its maximum strength is inbetween 20 to 20.4mhz, so we decided to have 20.1mhz as our centered operating frequency. The free space wavelength is therefore:-
Wavelength=3x108/20.1x106= 14.925meters Wavelength= 14.925meters Now, For dipole antenna
Length of antenna is given by
Length of dipole antenna to be used at 20.1 Mhz comes out to be 24.46 feets.
Dipole Antenna(Theoretical Length)
Exact antenna length=95% of Theoretical Length Exact length=24.46*0.95=23.28 feet. Length of copper wire to be used for antenna construction is 23.28 feet.
http://img62.imageshack.us/img62/8871/antenna2.jpg
Dipole antenna(Exact length) October 20, 2012, at 11:05 AM EST
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October 20, 2012, at 05:22 AM EST
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ciUh12 , [url=http://fxzlubgwegkr.com/]fxzlubgwegkr[/url], [link=http://edziabuekjfu.com/]edziabuekjfu[/link], http://nppfrvjrjtvg.com/ to:
sM58Rf <a href="http://orqmgxswwehi.com/">orqmgxswwehi</a> October 19, 2012, at 11:03 PM EST
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4.0 out of 5 stars Review ChannelMaster? 4228HD and a 2 Antenna Solution My house is in Mountain View, in the San Francisco Bay Area, 32 miles south from most San Francisco stations, and 14 miles nothwrest from some desirable stations in San Jose. to:
ciUh12 , [url=http://fxzlubgwegkr.com/]fxzlubgwegkr[/url], [link=http://edziabuekjfu.com/]edziabuekjfu[/link], http://nppfrvjrjtvg.com/ October 19, 2012, at 05:38 AM EST
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4.0 out of 5 stars Review ChannelMaster? 4228HD and a 2 Antenna Solution My house is in Mountain View, in the San Francisco Bay Area, 32 miles south from most San Francisco stations, and 14 miles nothwrest from some desirable stations in San Jose. October 17, 2012, at 03:01 AM EST
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If you're looking to buy these articles make it way easeir. to:
October 16, 2012, at 07:15 PM EST
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When my son was younger, I used to tell him, "Listen to me with your whole body." At the time, I didn't know he had ADD, but I knew he was esaliy distracted. Using my eyes to hear God--maybe that's the cure to my spiritual ADD? to:
If you're looking to buy these articles make it way easeir. October 16, 2012, at 03:35 PM EST
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Hi Wayne! Thanks for the comment! Nice to meet antheor fellow Ham who can relate to my antenna problems! I'm sorry that you lost your antenna, but I'm glad you and your family are all right! Tornado's and antennas definitely don't mix! I finally have rigged something up to get back on HF AND I'll be posting all about it shortly! It's great to be able to twirl that dial once again! Take care, Suzanne N1SUZ? to:
When my son was younger, I used to tell him, "Listen to me with your whole body." At the time, I didn't know he had ADD, but I knew he was esaliy distracted. Using my eyes to hear God--maybe that's the cure to my spiritual ADD? October 16, 2012, at 02:39 PM EST
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(:title Antenna and its types :)
Material of antenna
RADIO JOVE uses a dipole antenna which is made up of copper wire.Even a single piece of wire acts as an antenna.We can simply try to listening disturbances at SW receiver using a long piece of wire wrap with aluminium foil. DIPOLE ANTENNA FOR RADIO TELESCOPE
Wavelength = speed of light/frequency
For Radio Jove we chose 20.1mhz as our antenna operating frequency after considering the fact that the bursts occurring in the outer celestial bodies( eg all planets) emits radio waves broadly on all frequencies but till 15mhz all radio waves get absorbed by the ionosphere layer in our atmosphere and it start coming on earth from 18mhz but its maximum strength is inbetween 20 to 20.4mhz, so we decided to have 20.1mhz as our centered operating frequency. The free space wavelength is therefore:-
Wavelength=3x108/20.1x106= 14.925meters Wavelength= 14.925meters Now, For dipole antenna
Length of antenna is given by
Length of dipole antenna to be used at 20.1 Mhz comes out to be 24.46 feets.
Dipole Antenna(Theoretical Length)
Exact antenna length=95% of Theoretical Length Exact length=24.46*0.95=23.28 feet. Length of copper wire to be used for antenna construction is 23.28 feet.
http://img62.imageshack.us/img62/8871/antenna2.jpg
Dipole antenna(Exact length) to:
Hi Wayne! Thanks for the comment! Nice to meet antheor fellow Ham who can relate to my antenna problems! I'm sorry that you lost your antenna, but I'm glad you and your family are all right! Tornado's and antennas definitely don't mix! I finally have rigged something up to get back on HF AND I'll be posting all about it shortly! It's great to be able to twirl that dial once again! Take care, Suzanne N1SUZ? April 22, 2010, at 01:25 AM EST
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http://img62.imageshack.us/img62/8871/antenna2.jpg
Dipole antenna(Exact length) March 10, 2010, at 10:17 AM EST
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Dipole Antenna(Theoretical Length) to:
Dipole Antenna(Theoretical Length)
Exact antenna length=95% of Theoretical Length Exact length=24.46*0.95=23.28 feet. Length of copper wire to be used for antenna construction is 23.28 feet. March 10, 2010, at 09:54 AM EST
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Dipole Antenna(Theoretical Length) March 09, 2010, at 09:22 AM EST
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DIPOLE ANTENNA FOR RADIO TELESCOPE to:
DIPOLE ANTENNA FOR RADIO TELESCOPE March 09, 2010, at 09:19 AM EST
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Dipole Antenna(Theoretical Length) March 09, 2010, at 09:18 AM EST
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Length of dipole antenna to be used at 20.1 Mhz comes out to be 24.46 feets to:
Length of dipole antenna to be used at 20.1 Mhz comes out to be 24.46 feets.
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For Radio Jove we chose 20.1mhz as our antenna operating frequency after considering the fact that the bursts occurring in the outer celestial bodies( eg all planets) emits radio waves broadly on all frequencies but till 15mhz all radio waves get absorbed by the ionosphere layer in our atmosphere and it start coming on earth from 18mhz but its maximum strength is inbetween 20 to 20.4mhz, so we decided to have 20.1mhz as our centered operating frequency. The free space wavelength is therefore:- to:
For Radio Jove we chose 20.1mhz as our antenna operating frequency after considering the fact that the bursts occurring in the outer celestial bodies( eg all planets) emits radio waves broadly on all frequencies but till 15mhz all radio waves get absorbed by the ionosphere layer in our atmosphere and it start coming on earth from 18mhz but its maximum strength is inbetween 20 to 20.4mhz, so we decided to have 20.1mhz as our centered operating frequency. The free space wavelength is therefore:-
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Now, For dipole antenna to:
Now, For dipole antenna March 09, 2010, at 08:48 AM EST
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Wavelength=speed of light/frequency to:
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Wavelength=3x108/20.1x106= 14.925meters to:
Wavelength=3x108/20.1x106= 14.925meters Changed line 49 from:
Wavelength= 14.925meters to:
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Wavelength/2= 14.925/2= 7.46meters=24.46feet to:
Length= Wavelength/2= 14.925/2= 7.46meters= 24.46feet Length of dipole antenna to be used at 20.1 Mhz comes out to be 24.46 feets March 09, 2010, at 08:46 AM EST
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Wavelength=speed of light/frequency
Wavelength=3x108/20.1x106= 14.925meters \\ Wavelength= 14.925meters Now, For dipole antenna Length of antenna is given by
March 06, 2010, at 08:23 AM EST
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(:title Antenna and its types :)
Material of antenna
RADIO JOVE uses a dipole antenna which is made up of copper wire.Even a single piece of wire acts as an antenna.We can simply try to listening disturbances at SW receiver using a long piece of wire wrap with aluminium foil. DIPOLE ANTENNA FOR RADIO TELESCOPE
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