Comments on "A design of AM/FM mobile telephone triband antenna" [with reply

Abstract

Ploussios has read the paper by Egashira et al. (see ibid., vol.42, p.538, 1994), in which they describe the design of multiple band antennas using "double sleeves." He claims that the design of multiple band antennas employing multiple coaxial sleeves of the type described in the paper has been done before and is patented by Ploussios. The patent, 4509056, entitled "Multifrequency antenna employing tuned sleeve chokes," describes the use of multiple coaxial chokes in monopole and dipole type elements. The chokes (sleeves) are arranged in series and parallel, resulting in operation over selected frequency bands that are not harmonically related. The patent includes a description of two- and three-band monopole and dipole designs. Egashira et al. reply to the Comment. They conclude that it is their view that the triband antenna of the AM/FM and mobile telephone (with two bands of mobile station band and base one) cannot be designed using the ideas in Dr. Ploussios' patent.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>