Figure 3 Antenna Current Vs Potential between antenna wires and the air
Q-factor can be found as reactance of the circuit divided
to resistance of losses. When the BA has negative resistance,
the resistance compensates the resistance of losses in the antenna.
Q-factor of the circuit is increased and RF voltage across the
antenna circuit is risen. So, we have increasing in the receiving signals due
feeding the antenna by atmospheric electricity.
Certainly, there are lots interesting questions about
work of the Broom Antenna. What amplification the antenna may
provide? What is the power the antenna gives?
I. G.: The process
about appearance the corona discharge is described above with
some simplification. If you print in GOOGLE "corona discharge"
and then related phrase, you find hundreds pages containing
lots equation... But I leave it to real fun of the corona discharge.
It is may appear
wonderful, but at some conditions it is very possible to turn
the broom antenna into field having the "negative resistance."
Proper height above the ground or proper conditions of the atmosphere
may turn the antenna to field of the "negative resistance."
In the Figure 3 it is point Iopt. To keep the antenna
in the field of so called "negative resistance" it
is need to stabilize current into antenna wire. It is possible
to do feeding the antenna through "source of current."
However, the atmosphere is an ideal "source of current."
So being turn to the field of the "negative resistance"
antenna may stay at the conditions quite enough long time...
5. Antenna Amplifier
Part of curve
where potential drop but the current is risen is very interesting
part of the curve. The part of the curve has so called "negative
resistance." Electronic device that has curve with such
"negative resistance" may do amplification (of course
at some condition). The devices are tunnel diode, neon bulb,
Tunnel diode is used for amplification and generation at VHF-
UHF bands. Neon bulb, thyratron, thyristor
is used for generation up to hundreds kHz.
4 shows the simplified schematic of Antenna Amplifier.
In to antenna circuit is turn on the Broom Antenna. Current
in the antenna circuit at resonance increases in Q times, where
Q is Q-factor of the circuit.
What is the
lower and upper frequencies range of the Broom Antenna?
Be truth, I
do not know answer on the questions. The Broom Antenna required
more research. I will be grateful for any additional information
from those who made such researchers.
1. New Type
of Reception Antenna. Radiofront,
# 15, August 1935, page 50.
3. V. A. Nikitin.-
100 and one antenna design.- Moscow, publishing house
6. V. Polyakov.: Physics of aeroionization.
Radio, 2002, # 3, pp.: 36-38.
01. V. V. Vnyutin.: Detector
06. Handbook of Radio Amateur: F. Burdejnyj, N. Kazanskiy, A. Kamalyagin, K. Shulgin. Moscow,
publishing house DOSAAF, 1953