Novel Monopole Microstrip Antennas for GPS, WiMAX and WLAN Applications

摘要

In this paper, two novel low-profile monopole antennas are presented for simultaneous operation in GPS (Global Positioning System), WLAN (Wireless Local Area Network) and WiMAX (Worldwide Interoperability for Microwave Access) applications. The antennas constitute of a T-shaped microstrip feed line and directly coupled strips to generate multiple bands. The proposed antennas are printed on one side of a low-cost FR4 epoxy substrate and partial ground plane (metal plane is etched partially) are fabricated on the other side of the substrate. The overall dimension of antenna is 50 × 35 × 1.6 mm~3. Measured results show that the antennal (quad band) covers the four distinct operating bands of 320 MHz (2.17-2.49 GHz), 190 MHz (3.31-3.50 GHz), 270 MHz (5.18-5.45 GHz) and 700 MHz (5.5-6.20 GHz). Antenna2 (penta band) covers the frequency bands of 1.29-1.98 GHz (center frequency 1.61 GHz), 2.78-2.91 GHz (center frequency 2.83 GHz), 3.59-3.94 GHz (center frequency 3.75 GHz), 5.15-5.33 GHz (center frequency 5.24 GHz) and 5.39-6.06 GHz (center frequency 5.56 GHz). The detail antenna design and parametric analyses are discussed in steps. The characteristic of radiation pattern and gain are measured. The measured and simulated results are in good agreement. The antennas are designed using a simulation software HFSS v. 15.