Title :
Mutual impedance between bifilars of a quadrifilar helix antenna
Author :
Amin, M. ; Cahill, R.
Author_Institution :
Inst. of Electron., Commun. & Inf. Technol., Queen´´s Univ., Belfast, UK
Abstract :
In this paper we present the results of a study to quantify the mutual coupling between the two bifilars of a 1/2 turn 1/2 wavelength quadrifilar helix antenna (QHA). A new circuit model approach is used which is suitable for computing the impedance when the structure is fed by a single voltage source as in the case of a self phasing QHA. The validity of the circuit model is first confirmed by comparisons with simulated results obtained from the literature for various configurations of parallel fed dipoles.
Keywords :
antenna feeds; dipole antennas; electric impedance; electromagnetic coupling; helical antennas; bifilar; circuit model; impedance computation; mutual coupling; parallel fed dipole; quadrifilar helix antenna; self phasing QHA; voltage source; Admittance; Antenna measurements; Circuit simulation; Computational modeling; Computer simulation; Dipole antennas; Equations; Helical antennas; Impedance measurement; National electric code;
Conference_Titel :
High Frequency Postgraduate Student Colloquium, 2005
Print_ISBN :
0-7803-9500-X
DOI :
10.1109/HFPSC.2005.1566364
