1
Russell W Johnson, Robert E Munson: Circular microstrip vehicular rf antenna. Ball Corporation, Gilbert E Alberding, April 11, 1989: US04821040 (89 worldwide citation)

A compact, easy to manufacture quarter-wavelength microstrip element especially suited for use as a mobile radio antenna has performance which is equal to or better than conventional quarter wavelength whip-type mobile radio antennas. The antenna is not visible to a passerby observer when installed, ...


2
Johnson Russell Wayne, Munson Robert Eugene: Circular microstrip vehicular rf antenna.. Ball, August 17, 1988: EP0278070-A1 (19 worldwide citation)

A compact, easy to manufacture quarter-wavelength microstrip element especially suited for use as a mobile radio antenna has performance which is equal to or better than conventional quarter wavelength whip-type mobile radio antennas. The antenna is not visible to a passerby observer when installed, ...


3
Johnson Russell W, Munson Robert E: Antenne rf a microruban circulaire pour vehicule, Circular microstrip vehicular rf antenna. Ball Corporation, Johnson Russell W, Munson Robert E, MACRAE & CO, September 3, 1991: CA1288510

ABSTRACT OF THE DISCLOSURE A compact, easy to manufacturequarter-wavelength microstrip element especiallysuited for use as a mobile radio antenna hasperformance which is equal to or better thanconventional quarter wavelength whip-type mobileradio antennas. The antenna is not visible to apasserby obs ...