Ground Plane Vs No Ground Plane

[RADIOGUY2002]

Why this, below

http://www.tessco.com/products/displayProductInfo.do?sku=37792&eventPage=1

As opposed to this

http://www.tessco.com/products/displayProductInfo.do?sku=40468&eventPage=1

What is better for a security company that protects a mall property and has serveral underground structures. And runs a repeater at 40 watts, off of a 100 foot tall building.

 

[N_Jay]

Either

 

[RADIOGUY2002]

More Info

The property encompass about 300 acres, and long range communication is requested.

 

[Grog]

If the repeater is on the site, running 40 watts, then either should be just fine, but so would the perverbial "wet noodle",,,

 

[RADIOGUY2002]

Add PM

Grog, check your pm box for more details.

 

[Grog]

Yeah, I'm not able to fix anything, so it's best to post here where the smart people hang out....


His PM states......

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Okay you tell me,

Here's the deal the thing puts out 40 watts (well sussposed to) and is at 100 feet and is only getting out to about 9 miles. I see that as a prolbem, maybe I'm the only one. The other interseting part of all this is the ERP IS 22 WATTS, but the repeater homemade if you will to two M10's and three connector pannel (looks like a duplexer) sitting in the open and a interface box. You tell me whats wrong with that picture. The mobiles put out (m10 25 watts) with a 15 amp.

 

[rescuecomm]

I take it that the ability to receive portables is the problem.

Bob

 

[nec208]

Ground Plane Vs No Ground Plane

I thought Non Ground Plane are sky waves the radio waves go up into the sky and into space and Ground Plane the radio waves go in straight line along the ground?

What is better for a security company that protects a mall property and has serveral underground structures. And runs a repeater at 40 watts, off of a 100 foot tall building

.

Talk to TTC they need comms in the Toronto subway and I think someone on other group may be SCANOT where saying they have repeaters in the subway.Why do you need it so high if the comms are down to the ground and you don't have to see over buildings.

 

[N_Jay]

I thought Non Ground Plane are sky waves the radio waves go up into the sky and into space and Ground Plane the radio waves go in straight line along the ground?

Well you thought wrong.

Talk to TTC they need comms in the Toronto subway and I think someone on other group may be SCANOT where saying they have repeaters in the subway.Why do you need it so high if the comms are down to the ground and you don't have to see over buildings.

Hire a good consulting engineer who can decipher your needs and design a system to meet them.

 

[nec208]

Well you thought wrong.

Than want are they called?

Hire a good consulting engineer who can decipher your needs and design a system to meet them.

I'm sure a antenna 100 foot high will be no good in the subway .

 

[ReceiverBeaver]

Hey NEC208,

I don't mind your basic questions. It's okay to be a newbie, everyone has to start somewhere. But you'll have a harder and longer time trying to learn radio frequency engineering and practical applications theory on a hobby discussion board. Get ya few ham radio theory and antenna books.....is my suggestion.

Suggestion #2. Ignore NJay. His hobby is being a smartass and putting others down who are not as smart as he thinks they are.

Suggestion #3. The NAMES of radio things do NOT necessarily describe their function. Example: A Ground Plane antenna does not direct signals into the ground. If you come across a CB antenna called a MOONRAKER, CB'ers do NOT use such antennas to bounce signals off of the moon. It's just a name.

So do a little research and learn. And as stated before, unfortunately, browsing the RR forums does not count as research.


good luck and have fun with radios and....oh yeah.....when you get that radio.....read the manual.

 

[N_Jay]

Hey NEC208,

I don't mind your basic questions. It's okay to be a newbie, everyone has to start somewhere. But you'll have a harder and longer time trying to learn radio frequency engineering and practical applications theory on a hobby discussion board. Get ya few ham radio theory and antenna books.....is my suggestion.

Suggestion #2. Ignore NJay. His hobby is being a smartass and putting others down who are not as smart as he thinks they are.

Suggestion #3. The NAMES of radio things do NOT necessarily describe their function. Example: A Ground Plane antenna does not direct signals into the ground. If you come across a CB antenna called a MOONRAKER, CB'ers do NOT use such antennas to bounce signals off of the moon. It's just a name.

So do a little research and learn. And as stated before, unfortunately, browsing the RR forums does not count as research.


good luck and have fun with radios and....oh yeah.....when you get that radio.....read the manual.

Holly **** Batman!!!!!!!!!!!!

Beaver wrote a meaningful and correct post.

Well all except my hobby. It's more about being just a smartass.
Putting others down who are not as smart as they think they are, is just bonus entertainment.:lol: :lol: :lol:

 

[N4JNW]

Hey NEC208,

I don't mind your basic questions. It's okay to be a newbie, everyone has to start somewhere. But you'll have a harder and longer time trying to learn radio frequency engineering and practical applications theory on a hobby discussion board. Get ya few ham radio theory and antenna books.....is my suggestion.

Suggestion #2. Ignore NJay. His hobby is being a smartass and putting others down who are not as smart as he thinks they are.

Suggestion #3. The NAMES of radio things do NOT necessarily describe their function. Example: A Ground Plane antenna does not direct signals into the ground. If you come across a CB antenna called a MOONRAKER, CB'ers do NOT use such antennas to bounce signals off of the moon. It's just a name.

So do a little research and learn. And as stated before, unfortunately, browsing the RR forums does not count as research.


good luck and have fun with radios and....oh yeah.....when you get that radio.....read the manual.

Suggestion #2 is the best piece of advice you'll ever recieve on this forum... Remember it, and you'll go far..

 

[nec208]

I just looked it up what a Ground plane is.And just what make sure I undersand it sorry if I got everyone confused here.

In telecommunication, a ground plane structure or relationships exists between the antenna and another object, where the only structure of the object is a structure which permits the antenna to function as such (e.g., forms a reflector or director for an antenna). This sometimes serves as the near-field reflection point for an antenna, or as a reference ground in a circuit.

So to make sure I understand this the antenna is like a structure it can come in many forms like a reflector or director or a reflection point so on.

There are a variety of ground planes, including drooping ground planes, and flat circular ground plane antennas. A ground plane may consist of a natural surface, such as the Earth (or ocean) or an artificial surface of opportunity (such as the roof of a motor vehicle). A ground plane can also be a specially designed artificial surface (such as the radial elements of a quarter-wave ground plane antenna).

So I can see they use those ground planes to control the readio wave but was this not what HARP was doing ???

I don't mind your basic questions. It's okay to be a newbie, everyone has to start somewhere. But you'll have a harder and longer time trying to learn radio frequency engineering and practical applications theory on a hobby discussion board. Get ya few ham radio theory and antenna books.....is my suggestion.

Well it is not that I want to be very smart or know every thing I just asking basic questions that interest me.I think other get bad when I don't understand enough about it.

 

[Don_Burke]

Suggestion #2 is the best piece of advice you'll ever recieve on this forum... Remember it, and you'll go far..

This board does have an "ignore list" function.

I have found it to be very effective.