Spiral type parasitic elements patch antenna

Mishra

2019

COMPEL

Purpose Purpose of this study is to design a compact gap coupled anchor shape patch antenna for wireless local area network/high performance radio local area network and worldwide interoperability for microwave access applications. Design/methodology/approach An anchor shape microstrip antenna is conceived, designed, simulated and measured. The anchor shape antenna is transformed to its rectangular equivalent by conserving the patch area. Modeling and simulation of the antenna is performed by Ansys high frequency structure simulator (HFSS) electromagnetic solver based on the concept of finite element method. The simulated results are experimentally verified by using Agilent E5071C vector network analyzer. Theoretical analysis of an electromagnetically gap coupled anchor shape microstrip patch antenna has been performed by obtaining the lumped element equivalent of the transformed antenna. Findings The proposed antenna has a compact conducting patch of dimension 0.26λ × 0.12λ mm2 (λ is calculated at lower resonating frequency of 3.56 GHz) with impedance bandwidths of 100 and 140 MHz and antenna gains of 1.91 and 3.04 dB at lower resonating frequency of 3.56 GHz and upper resonating frequency of 5.4 GHz, with omni-directional radiation pattern. Originality/value In literature, one does not encounter anchor shape antenna using the concept of gap coupling and parasitic patches. The design has been optimized for wireless local area network/worldwide interoperability for microwave access applications with a relatively low patch area (291.12 mm2) as compared to other reported antennas for wireless local area network/worldwide interoperability for microwave access applications. Transformed antenna and the actual experimental antenna behavior varies, but the resonant frequencies of the transformed antenna as observed by theoretical analysis and simulated results (by high frequency structure simulator) are reasonably close, and the percentage difference between the resonant frequencies (both at lower and upper bands) is within the permissible limit of 1-2.5 per cent. Results confirm the theoretical proposition of transformation of shapes in antenna design, which allows a designer to adapt the design shape according to the application.

Section: Introductionmentioning

confidence: 99%

Anchor shape gap coupled patch antenna for WiMAX and WLAN applications

Mishra

2019

COMPEL

Micro & Optical Tech Letters

“…Poor gain, narrow bandwidth, and poor efficiency are few of the limitations of patch antenna and techniques such as cutting slots, increasing substrate thickness, using low dielectric constant substrate, generally improves either gain or bandwidth, but Ref. emphasizes that there are certain parasitic elements techniques that can effectively enhance bandwidth and gain simultaneously.…”

Section: Introductionmentioning

confidence: 99%

An ultra compact triple band antenna for X/Ku/K band applications

Mishra

2019

A simple and practical method to design an ultra compact (128 mm2) patch antenna for X, Ku, and K band applications is presented. The antenna parameters such as current distributions, return loss, antenna gain, radiation pattern, efficiency, and group delay are discussed. Proposed design resonates at three frequencies of 8.9 GHz (simulated) and 8.7 GHz (measured), 16.5 GHz (simulated) and 16.4 GHz (measured), and 19.8 GHz (simulated) and 19.6 GHz (measured) were presented. The proposed prototype achieves peak gain of 8.08 dBi (simulated) and 8.4 dBi (measured), 8.02 dBi (simulated) and 8.3 dBi (measured), and 3.12 dBi (simulated) and 3.8 dBi (measured) in X, Ku, and K band, respectively. The overall maximum efficiency is found to be 88% for Ku band, 87.7% for X‐band, and 78% for K‐band. Group delay variation remains below the accepted range (0.8 ns). The proposed antenna is analyzed using HFSS software by ANSYS and the simulated results have been validated by experimental results.

Micro & Optical Tech Letters

“…Then, new operating modes can be introduced with parasitic elements, as reported in References . The feeding structure of the patch antenna is also an important factor that limits the operating bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A compact broadband differential‐fed microstrip patch antenna with 5.8 GHz WLAN band‐notched under quad‐mode resonance

Feng

Zhang

Weng

et al. 2019

A compact broadband differential‐fed microstrip patch antenna with 5.8 GHz WLAN band‐notched under quad‐mode resonance is proposed in this article. The antenna consists of two hybrid shape radiation patches and a pair of capacitances loaded loop (CLL) resonators. The broadband performance is achieved by integrating TM10 and TM01 radiation modes of rectangular patches and TM1,0,−1 radiation mode of triangular patches. Then these three radiation modes are adjusted close to each other to form a wide operation band. After that, with the loading of CLL resonators, a nonradiative resonant mode is introduced. Thus, the low‐frequency band of the proposed antenna can be further expanded, and a frequency notch point is introduced in 5.8 GHz WLAN band. Finally, the proposed antenna is fabricated and measured. The measured impedance bandwidth is about 43.5% (5.93‐9.23 GHz) while keeping a compact structure without any air gaps. Additionally, the broadside gain is varied from 4 to 6 dBi with a notch point at 5.8 GHz.