Wideband Omnidirectional Slotted Patch Antenna With Filtering Response

A new compact patch antenna, which is arranged perpendicular to a circular ground plane, for WLAN operation is presented. The antenna consists mainly of one driven patch and one shorted parasitic patch, both of which wind along two concentric circles. A constructed prototype covering the 2.4 and 5 GHz WLAN bands is demonstrated. Good broadside radiation characteristics are obtained across the operating bands. Details of the proposed patch antenna and experimental results are presented and discussed.

The wireless technology and broadband applications nowadays are very advanced from their early stages, but still an antenna is the indispensable item in these technologies. Hence this paper presented a compact micro strip 2X1 patch antenna for applications in WLAN band operating in the 5GHz–6GHz frequency range. Two element compact patch antenna with a combination of simple diamond decoupling structure is presented here. This antenna is constructed using RO 4350 substrate used for high frequency applications. After simulation with CST software the performance of the proposed antennas is investigated and compared to both the cases. An improvement of 9.2dB in coupling loss (S21) and 3.2dB in return loss (S11) are achieved.

In this research, we utilized Ansoft's HFSS v13, which is a Finite Element Method (FEM) based electromagnetic (EM) simulator, to design and analyze two types of patch antennas: a 1x4 circular microstrip patch antenna and a 1x4 hexagonal microstrip patch antenna, operating at 5 GHz. The circular patch antenna was fabricated on a FR4 substrate with a dielectric constant of 4.4dB and a height of 1.6mm. Various antenna characteristics, such as return loss, radiation pattern, directivity, gain, return loss and radiation efficiency, were investigated. The designed 1x4 hexagonal patch antenna and 1x4 circular patch antenna achieved a bandwidth of 3.79% with return loss values well below -30dB. Additionally, a favorable directivity value of 4.5dBi and a gain of 2.7dBi for the 1x4 circular patch antenna and a gain of 3.9dBi for the 1x4 hexagonal patch antenna were obtained. Due to their C-band architecture, these microstrip patch antennas can be employed in various satellite communication applications, such as transponders.

A triple-band compact circular patch antenna with hexagonal complementary split ring resonators (CSRR) is proposed for sub-6 GHz 5G applications. A circular patch antenna is created on the top plane of the proposed triband antenna. The ground plane is etched with hexagonal CSRRs, multiple band generation and size reduction (at the lower bands). The circular patch antenna&#x0027;s initial resonance is likewise shifted from 5.25 GHz to 6.52 GHz and 4.88 GHz due to the CSRR. WiMAX, 5G sub-6 GHz, and WLAN operating frequencies can all be covered by the proposed triple antenna band of 3.35 GHz (3.27-3.83 GHz), 4.46 GHz (4.20-4.69 GHz), and 5.63 GHz (5.54-5.99 GHz) respectively. This can be performed by meticulously calculating the CSRR&#x0027;s size and location on the ground plane. The design is <tex>$32\times 36\ \text{mm}^{2}$</tex> in size and is made on a low-cost FR-4 substrate.

A single feed compact novel slotted circular patch antenna for operating in 3.5 GHz mobile WiMAX applications is presented in this paper. The proposed antenna is designed using low cost FR4 substrate and copper material. The proposed antenna has the lowest dimension of 20×30 ×1.6 mm3. The proposed antenna is simulated in CST Microwave Studio. The proposed antenna resonates at 3.5 GHz resonant frequency with the bandwidth of 350 MHz and return loss of - 32 dB. The proposed antenna achieved the peak gain of 5.36 dBi. along with the efficiency of 96 %. The proposed single feed compact novel slotted circular patch antenna is suitable for 3.5 GHz mobile WiMAX applications.

Patch antennas usually involve a ground plane much larger than the radiating element. To make a patch antenna compact, it is significant to reduce the size of the large ground plane. In this paper, a compact multi-folded patch antenna with a substantially small ground plane for UWB (ultra wideband) application at the UHF (ultrahigh frequency) band is presented. The proposed antenna is derived from an ordinary L-shaped monopole antenna, and with the dimension of only 0.22λL× 0.092λL× 0.091λL (λL is the longest wavelength in the operating bandwidth) after folding the L-shaped radiating patch over the small ground plane. The characteristics such as impedance bandwidth, gain and pattern stability are analyzed and measured. According to the measured results, the antenna has an impedance bandwidth up to 61.5% for VSWR≤2, ranging from 450 MHz to 850 MHz, covering the band of DVB-T (Digital Video Broadcasting-Terrestrial) (470 MHz-862 MHz) and DTV (Digital TV) (470 MHz-806 MHz). Details of the fabricated antenna are described, and a prototype of the design example is constructed and studied.

The high-frequency electromagnetic waves may propagate into the ball through the aperture on a continual metallic shell, so that the wireless monitoring in the shell by high-frequency electromagnetic waves is available. The wireless monitoring system needs an antenna to transmit and accept signals. Microstrip antennas are the consequent choice for the system because of the planar structure and small size. In this paper, the transmission of the electromagnetic waves in the metallic slit will be studied and simulated. And then a useful compact microstrip patch antenna was proposed for the wireless monitoring system. Finally, several approaches are combined to minimize the antenna. The length of the compact patch antenna is 12.5mm and width is 15mm, which size is less than 75% of the conventional patch antenna and the gain is more than 25%.

The primary objective of this paper is to design a high performance metamaterial antenna and benchmark the performance with a microstrip antenna. A circular microstrip patch antenna is considered for demonstrating the performance of the antenna with and without the metamaterial structures. This paper clearly brings out the advantages of the metamaterial circular patch antenna as compared to the standard circular microstrip antenna. Simulations and measurements are carried out for comparison purpose. The developed metamaterial based patch antenna shows a significant reduction in size by 25% when compared to a circular patch antenna. It has been found that reduction of size in developed metamaterial based antenna does not degrade the directivity performance which is found to be 6.5 dB. Further, the bandwidth of the metamaterial based antenna is found to be same as that of microstrip antenna. RCS simulation has shown reduction in RCS by 9 dBsm.

A comprehensive study of compact flexible patch antenna, which is the suitable topology for medical telemetry operated in the industrial scientific and medical (ISM) band, is presented. For establishing efficient wireless links for assisting medical diagnostics, the antenna is required to be of a low profile, safe, and simple geometry. To achieve the compactness of the structure, Taguchi’s optimization method has been applied based on the concept of orthogonal array. The designed antenna uses two distinct flexible substrates, namely polyethylene terephthalate (PET) with dimension 43.5x36.89x0.175 mm3, and Rogers RT/Duroid 5880 with dimension 48.5x49.66x1.58 mm3 categorized under materials, namely plastic and circuit (microfiber reinforced PTFE) material respectively. The approach has been demonstrated for a simple, compact flexible antenna with reduced dimension by 5.37% for PET, and 23.96% for RT 5880 as compared to the conventional rectangular patch design parameters. The resonant frequencies of the designed antennas are 2.435 GHz and 2.45 GHz for PET, and Rogers RT/Duroid 5880, respectively, with a bandwidth of 73.2MHz for RT/Duroid, and 16.8 MHz for PET. The maximum observed directivity of the proposed antenna using PET and Rogers RT/Duroid 5880 are 5.15 dBi, and 6.117 dBi, respectively, at 2.45 GHz. Furthermore, characterization for performance variation is carried out through bending analysis for different curvatures and Specific Absorption Rate (SAR) analysis in order to demonstrate its suitability for direct integration with wearable biomedical sensing chips used for medical telemetry.

Microstrip patch antennas are mostly due to their versatility in terms of possible geometries that makes them applicable for many different situations. The lightweight construction and the suitability for integration with microwave integrated circuits are two more of their numerous advantages. A single layer, single feed compact slotted patch antenna is thoroughly simulated in this paper. The aim of this work is to design and to implement a microstrip patch antenna array that meets the requirements of a microwave communications system. Resonant frequency has been reduced drastically by cutting `Two hexagonal and a circular' like shape slots from the conventional microstrip patch antenna. For the design of the antenna, simulation tool software IE3D, based on the Method of Moments (MoM) was used. After simulating and optimizing a single element proposed antenna that achieved satisfactory measurement results with also size has been reduced by 80.22% when compared to a Conventional microstrip patch antenna.

In this paper an innovative microstrip patch antenna is designed to enhance the return loss. This work presents the comparative analysis of the return loss enhancement between the microstrip patch antenna and circular patch antenna. Materials and methods: The return loss of proposed microstrip patch antenna was compared to circular patch antenna in High-frequency structure simulator environment. The sample size estimation is done using the G Power statistical tool with probability of 80% and the total sample size of the research is 20 and consists of two groups i.e for each group 10 samples. From the SPSS analysis the significance is obtained (0.039) which is less than 0.05. Results: The return loss is improved for -40.56 in the proposed innovative microstrip patch antenna in ka-band frequency range compared to circular patch antenna (−12.59 dB). Conclusion: Within the limits of this study, the proposed microstrip patch antenna attained higher return loss in Ka-band. The results are verified using the HFSS modeling.

A compact single-layer filtering patch antenna with wide harmonic suppression and enhanced bandwidth

A compact lotus shape dual band microstrip patch antenna is presented in this article. Dual‐band operation for both Bluetooth and ultra wideband (UWB) is covered with low profile, enriched gain, and small size. The lotus shape patch and Sawtooth ground provide smooth impedance bandwidth, and dual band characteristics are achieved. In lower frequency, the antenna cover about 300 MHz from 2.3 to 2.6 GHz (Bluetooth), while in upper frequency, bandwidth is about 7.7 GHz from 3.3 to 12 GHz which covers UWB band. With a dimension of 44 × 42 mm2, the proposed antenna is fed by a microstrip fed line and printed on less expensive FR‐4 substrate. The simulated and measured result of impedance, radiation pattern, gain, and efficiency are fair enough. This antenna shows an omnidirectional radiation pattern across the integrated Bluetooth and UWB bands both theoretically and experimentally. With an excellent impulse response, high fidelity, and quality factor, the proposed antenna is suitable for using dual band frequency of both Bluetooth and UWB without interference between each other.

A compact high-gain patch antenna using stacked rings based on low-temperature co-fired ceramic (LTCC) multilayer technology is proposed in this paper. Three metal stacked rings are employed to surround the patch antenna, acting as directors to guide the electromagnetic wave radiating toward broadside and, hence, improve the antenna's gain. Also, three ground planes are connected by metallic vias to form a cavity-backed structure, which suppresses the outward propagating diffraction wave and contributes to the improvement of the antenna’s gain either. The fabricated antenna achieves a high gain of 8.1 dBi at 36.7 GHz including the loss of the feeding parts and radio-frequency (RF) probe, and the gain is relatively stable within the bandwidth. Furthermore, the antenna only occupies a compact size of mm3 which is much smaller than most of the other high-gain patch antennas on LTCC.

A compact dual-polarized stacked patch antenna for 5G millimeter-wave applications is proposed. Patch antenna is adopted here for simple structure and low profile. In order to broaden the bandwidth of traditional patch, a stacked square patch is added at first. Then, four parasitic patches are symmetrically located with the square patch for impedance matching. After that, metalized vias are utilized to increase the capacitance to ground of the lower patch for the purpose of size miniaturization. Simulated results highlight that the antenna has a wide bandwidth of 21.7%, from 23.8 GHz to 29.6 GHz with a compact structure (4.0 x 4.0 x 0.81 mm3) and stable radiation characteristic.