Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
Walter,
You said: "When power P is delivered to the antenna and all of the power radiated is then integrated over the entire hemisphere, the integrated power will equal power P exactly. Now, because all of the power delivered to the antenna is radiated, any increase in radiated power due to some change in the configuration of the antenna is impossible. Therefore, this constitutes proof that your claim of gain with the EH configuration is invalid." I disagree. I think all you've asserted is conservation of energy, not whether or not the antenna has gain. Joe W3JDR |
#2
![]() |
|||
|
|||
![]()
On Wed, 14 Jan 2004 00:01:54 GMT, "W3JDR" wrote:
because all of the power delivered to the antenna is radiated, any increase in radiated power due to some change in the configuration of the antenna is impossible. Therefore, this constitutes proof that your claim of gain with the EH configuration is invalid." I disagree. I think all you've asserted is conservation of energy, not whether or not the antenna has gain. Hi Joe, Walter has asserted that there is a constancy of power confirmed by total integration. Any increase in radiation with the same applied power is impossible by definition. One can observe a gain relative between two antennas and this would require significant differences in the two patterns. However, the data from the FCC methods of testing prove there is no difference. Except, of course, by that due to the nearby resonant structure which perturbs the EH field slightly (which, when wholly integrated reveals the familiar low efficiency of the EH relative to the nearby standard tower). 73's Richard Clark, KB7QHC |
#3
![]() |
|||
|
|||
![]()
Richard:
"One can observe a gain relative between two antennas and this would require significant differences in the two patterns. " I believe this is in line with what Ted says...the EH purportedly has vertical adjustable pattern depending on the length to diameter ratio of the cylinders. "However, the data from the FCC methods of testing prove there is no difference. " Well, that's the way I interpreted the data too. However, I don't believe this was a 3 dimensional measurement, was it? Joe W3JDR |
#4
![]() |
|||
|
|||
![]()
Joe, W3JDR wrote:
"However, I don`t believe this was a 3 dimensional measurement, was it?" Purpose of 3-D pattern checks would present high-angle radiation if it exists as a possible source of night time interference. Primary service only includes non-interfered ground wave coverage of a station. Best regards, Richard Harrison, KB5WZI |
#5
![]() |
|||
|
|||
![]()
On Wed, 14 Jan 2004 11:01:47 GMT, "W3JDR" wrote:
Richard: "One can observe a gain relative between two antennas and this would require significant differences in the two patterns. " I believe this is in line with what Ted says...the EH purportedly has vertical adjustable pattern depending on the length to diameter ratio of the cylinders. That can only be a function of physical size and wavelength, or of physical distance between sources (emitters) in terms of wavelength. Neither condition exists (the antenna is small, and is only one source). Beam steering and beam focusing antennas exhibit BOTH of these characteristics, the eh neither. "However, the data from the FCC methods of testing prove there is no difference. " Well, that's the way I interpreted the data too. However, I don't believe this was a 3 dimensional measurement, was it? Hi Joe, There is little point in speculating about radiation straight up. If that is the only benefit to the antenna, it is certainly no benefit to the listener (definition of a Dummy Load). Field tests prove the listener enjoys no advantage from this speculative gain. Simple fact of the matter is revealed at the test site. Are they using an eh, or the standard quarterwave over standard radials? The acid test of capitalist greed has eroded these fairy-tale claims. 73's Richard Clark, KB7QHC |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Inverted ground plane antenna: compared with normal GP and low dipole. | Antenna | |||
Poor quality low + High TV channels? How much dB in Preamp? | Antenna | |||
Passive Antenna Repeater Revisited | Antenna | |||
QST Article: An Easy to Build, Dual-Band Collinear Antenna | Antenna |