Electrically Small Loop Antenna with Horizontally Omnidirectional Radiation Pattern

This paper presents an electrically small loop antenna (ESLA). Using regularly placed capacitors between segments of the loop and proper feeding structure provides a uniform current distribution along the ESLA resulting in a horizontally omnidirectional radiation pattern. The antenna is simulated at 100 MHz producing a high radiation efficiency of over 90% and desired omnidirectional radiation pattern, showing potential for use in a direct antenna-modulated system.