A Miniaturized Volkswagen Logo Uwb Antenna With Slotted Ground Structure and Metamaterial for Gps, Wimax and Wlan Applications

Micro & Optical Tech Letters

Khaleeq

Pathan

et al. 2017

Self Cite

A compact planar four band antenna loaded with metamaterial and slots for GPS, WLAN, and WiMAX applications, is presented in this letter. Initially, a dual‐band (2.9 and 5.9 GHz) antenna is designed by etching trapezoidal shaped slots in the radiating patch and rectangular shaped slots in the ground plane. In order to make the dual band antenna to operate at more number of bands, two identical metamaterial unit cells are introduced in the ground plane. The introduction of metamaterial creates additional resonance at 1.5 and 5.2 GHz, respectively. The proposed design has a dimension of 0.21 bold-italicλ0× 0.23 bold-italicλ0×0.01bold-italicλ0 at a lower frequency of 2.4 GHz, and operates at 1.5 (GPS), 2.4, 5.2 (WLAN), and 3.5 GHz (WiMAX) frequency bands, respectively. The proposed metamaterial negative permeability retrieval mechanism through waveguide medium is discussed in detail. The proposed design has measured S11 < −10 dB bandwidth of about 6.06% (1.6–1.7 GHz), 8.33% (2.3–2.5 GHz), 5.55% (3.5–3.71 GHz), and 5.94% (4.9–5.2 GHz), respectively. Good impedance matching, stable radiation characteristics with low cross‐polarization and an average gain of 2.25 dBi, are observed across the operational bandwidths, when the antenna is fabricated and tested.

Section: Introductionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

A multiband antenna loaded with metamaterial and slots for GPS/WLAN/WiMAX applications

Micro & Optical Tech Letters

Khaleeq

Pathan

et al. 2017

Self Cite

“…The etching of DGS on the ground plane of an antenna perturbs the current length path, as a result of which the effective capacitance and inductance changes, thereby resulting in antenna miniaturization. Several studies have reported the use of DGS to miniaturize the patch antenna . However, the antenna designed using DGS structure in this research outperforms the antenna studied in literature in terms of size, miniaturization achieved, complexity, and number of operating modes, as illustrated in Table .…”

Section: Introductionmentioning

confidence: 81%

A triple‐band highly miniaturized antenna for WiMAX/WLAN applications

Micro & Optical Tech Letters

Biradar

2018

Self Cite

A novel highly miniaturized triple band antenna for WiMAX and WLAN applications is presented in this letter. The proposed design has an active patch area of only 108 mm2 (9 × 12 mm2), and operates at 2.5 (lower WiMAX), 3.47 (middle WiMAX) and 5.75 GHz (WLAN), respectively. Miniaturization in the proposed design is accomplished by etching 2 novel cascaded E‐type unit cell defected ground structure in conjunction with the F‐shaped slot, and multiband operations are achieved by etching U and H‐type slots in the radiating monopole. The miniaturization process leads to the reduction of about 82.4% and 73.5% in the active patch area and volume of the proposed antenna respectively, as compared with the conventional designed triple band antenna. The antenna has a compact volume of 0.15 λ0 × 0.15 λ0 × 0.01 λ0 at a lower resonance of 2.6 GHz. The proposed structure has S11<–10 dB bandwidth of about 6.45% (2.55–2.72 GHz), 3.03% (3.25–3.35 GHz) and 5.9% (5.75–6.1 GHz) in simulation, and about 4.2% (2.51–2.62 GHz), 2.31% (3.42–3.50 GHz), and 4.81% (5.68–5.96 GHz) under measurement, respectively. Stable radiation characteristics and good impedance matching are observed across the operational bandwidth of the proposed design.

“…This is due to the fact that decrease in the patch size shifts the frequencies to higher resonance. Nevertheless, several miniaturization techniques have been reported in the literature, namely, substrate with high dielectric constant, slotted patch, defected ground structure (DGS), Metamaterials (MTM), magneto‐dielectrics, and so on. However, as compared to the aforementioned miniaturization techniques, slots are easy to implement, are less complex, occupies smaller space, cost‐effective, and have a great relevance in microwave circuit design …”

Section: Introductionmentioning

confidence: 99%

A miniaturized circularly polarized coaxial fed superstrate slot antenna for L‐band application

Internet Technology Letters

Saadh

Pathan

et al. 2018

Self Cite

A miniaturized circularly polarized superstrate antenna is presented in this letter. The antenna consists of a corner cut square radiating patch in which 4 arrow type slots are etched out, a superstrate placed exactly above the radiating patch and a coaxial feed. Circular polarization in the design is accomplished by the corner cuts in the radiating patch and placing the feed point below origin (0, 0, 0) along x‐axis. The slot miniaturization technique results in about 73.7% and 79.8% reduction in volume and active patch area of the designed antenna. The antenna has a compact dimension of about 0.11λ0 × 0.11λ0 × 0.02λ0 at a frequency of 1.21 GHz with S11 < − 10 dB bandwidth of about 3.03% (1.30–1.34 GHz). Axial ratio < 3, good impedance matching, acceptable gain, radiation efficiency greater than 90%, and stable radiation characteristics are observed across the operational bandwidth of the designed antenna.