
78
Table 4.4 φ Factor for calculating
loop inductance
Shape Factor (φ)
Circle 2.451
Octagon 2.561
Hexagon 2.66
Pentagon 2.712
Square 2.853
Triangle 3.197
Of these equations, most people will find that the Grover equation
most accurately calculates the actual inductance realized when a prac-
tical loop is built.
References
Andrew Antennas (1991). Catalog 35. Illinois.
Belcher, R. et al. (1989). Newnes Mobile Radio Servicing Handbook.
Butterworth-Heinemann, Oxford.
Davies, J. (1987). Private Mobile Radio – A Practical Guide. Heinemann,
London.
Green, D.C. (1979). Radio systems, Vols II and III. Pitman, London.
Kennedy, G. (1977). Electronic Communication Systems