Abstract
This research paper presents two different types of multiband patch antenna. The first design is a dual-band antenna and the second design is a quad-band antenna. Both the antennas have a compact size of , and is designed on FR4 substrate with loss tangent (=0.02, height (h)=1.6 mm, with dielectric constant of 4.4. The dual-band antenna operates at frequencies 3.9 and 5.71 GHz. These dual band operations are accomplished by utilizing L-shaped slot in the ground part and T-shaped slot in the radiating part of the patch antenna. The gain corresponding to the two frequency bands are 1.27 and 1.35 dB, respectively. The quad band antenna operates at frequencies 3.6, 4.9, 7.4 and 8 GHz. The gain corresponding to these frequencies are 0.18, 1.69, 2.25 and 3.99 dB. For achieving quad band operation from the dual band antenna the back plane L-shaped slot is modified by cutting a rectangular strip in the middle, hence dividing it into two different slots. The front plane is also modified by introducing two rectangular strips to the T-shaped patch. The proposed antenna shows multiband and has the advantage of simple structure compact size and good impedance matching. All the simulations of the proposed design are carried out in HFSS v.13.0.
Highlights
Due to the competitive advancements in the area of wireless communications in recent years, there is a necessity for efficient designing of the antenna, as it plays a significant role in the functioning of the wireless system [1,2,3,4,5,6,7]
The proposed structure of dual band antenna has a total dimension of 30 × 30 × 1.6 mm3 at lower resonance of 3.9 GHz
The proposed dual band antenna can work for middle WiMAX (3.9 GHz) and WLAN (5.7 GHz) applications
Summary
Due to the competitive advancements in the area of wireless communications in recent years, there is a necessity for efficient designing of the antenna, as it plays a significant role in the functioning of the wireless system [1,2,3,4,5,6,7]. The discovery of multiband nature of antennas was an important revolution in this field. Different types of antenna designed to cover the wireless applications are monopole [8,9,10,11], dipole [12], patch antenna [13,14,15] etc. In order to fulfill the criteria of good wireless quality and larger implantation coverage on one device, multiband antennas prove to be very beneficial as each part covers the best operation of a particular band. Various types of microstrip fed antennas are proposed due to its simple structure and its ability to integrate with RF circuits. In [16] a quad-band antenna of size 30 × 30 × 1.6 mm at operating
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