BRIEF HISTORY.

 

At the start of our investigation we experimented with many different antennas (flagpole antennas, wide band dipoles, TEM-horns, slot antennas, loop antennas, Harmut's large current radiators and antenna arrays). The purpose was to understand the physical phenomena of illumination process of the pulse electromagnetic wave, and to clear up the main regularities and dependences, which determine the radiation efficiency and wide broadbandness of antenna systems. In addition, we also investigated what antenna parameters influence the antenna characteristics in order to obtain a comprehensive solution. We had to make ourselves be able to "sense" an antenna.

 

Results of these researches are published in the following articles and conference reports:

 

q       G.P. Pochanin, S.V. Rotary Antennas Radiating Videoimpulse Signals // Physical Investigations with a Millimeter and Submillimeter Radiowaves - Kharkov:IRE NANU, 1991, p.140-146 (in Russian).

q       S.A. Masalov, G.P. Pochanin S.V. Rotary Loaded Slot Antenna for Radiating of Videoimpulses with Nanosecond Duration // Scientific Instrument - Making for a Millimeter and Submillimeter Radiowaves - Kharkov:IRE NANU, 1992, p.55-62 (in Russian).

q       G.P. Pochanin P.V. Kholod Slot Cylindrical Radiator of Nonsinusoidal Waves // Using of Millimeter and Submillimeter Radiowaves - Kharkov:IRE NANU, 1993, p.112-119 (in Russian).

 

and most completely in lecture:

 

q       G.P. Pochanin ULTRA-WIDEBAND / SHORT-PULSE ANTENNAS // Northrop Grumman Electrodynamics and Applications Symposium in Santa Monica, CA, in September 16-18, 1997.

 

EXAMPLES OF ANTENNAS DEVELOPED.

 

• Loaded wideband dipole

• Investigation and development of the Harmut's Large Current Radiator (LCR) was selected as the promising direction for UWB/SP electromagnetic wave radiators. The LCR is inherently a non-resonating structure and thus permits radiation of electromagnetic waves with either sinusoidal or non-sinusoidal time variation. This makes the LCR a very promising radiator for UWB radar and radio communication systems. We are active in the development of such systems, several examples of which are shown below:

• LCR with avalanche transistor switch.

• LCR with S-diode switch

• LCR with "traveling wave" pulse generator.

• Small-size pulse LCR.

• LCR for variable pulse width radiation.

 

• Sensors for measurement of magnetic and electric components of impulse electromagnetic field strength of the nanosecond pulse duration range are the first results of receiving antenna development. Two antennas have been developed and tested that have similar Hertzian electric and magnetic dipoles. 

 

Our experts in antenna development are:

Gennadiy P.Pochanin               (E-mail gpp@ire.kharkov.ua)

Pavlo V.Kholod               (E-mail kholod@ire.kharkov.ua)