A Printed LPDA Antenna Fed by a Microstrip Line to Double Sided Parallel Strip Line from Backside

Abstract

A novel planar printed log-periodic dipole array (LPDA) antenna fed by tapered microstrip line (MSL) to double sided parallel strip line (DSPSL) is proposed in this paper. The proposed antenna adopts MSL feeding approach from backside. Using this feeding technique makes the printed LPDA antenna easier to be integrated into radio frequency (RF) circuits. In this paper, four layers are used to construct the antenna. The four layers of the printed LPDA antenna are printed on three thin dielectric substrates which are integrated together. To validate this approach, a printed LPDA antenna is simulated and fabricated for operating in the S and C bands (2.5-6 GHz). The antenna showed a good result over the whole frequency range with 2 : 1 VSWR, an average gain of 6.5 dB, and stable radiation patterns. The measured results are in very good agreement with simulations.

Printed log‐periodic trapezoidal dipole array antenna with a balun‐feed for ultra‐wideband applications

“…Based on the above results, we compared performances of the PLPTDA antenna with its counterpart antennas in the literature; in terms of antenna size, bandwidth ratio and antenna gain (Table 1). Thus, the bandwidth of the proposed antenna is broader than those in [4–6, 11–14, 16–18, 20, 21, 23, 24] and the measured gain of the PLPTDA antenna is higher than in [4, 6, 7, 11–21, 23, 24]. Although the proposed antenna bandwidth is 1:9 same as the antenna in [15], they aimed to increase the antenna gain at WLAN (2.45 and 5.27 GHz) frequencies.…”