Bandwidth Enhancement of Microstrip Slot Antenna (original) (raw)
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Two printed wide-slot antennas with E-shaped patches and slots, for broadband applications, are proposed. They are fed by a coplanar waveguide (CPW) and a microstrip line with almost the same performances. Detailed simulation and experimental investigations are conducted to understand their behavior and optimize for broadband operation. Good agreement between the measurement and simulation has been achieved. The impedance bandwidths, determined by 10-dB reflection coefficient, of the proposed slot antennas fed by microstrip line and CPW are examined from both measurement and simulation. We have obtained the large operating bandwidth by choosing suitable combinations of feed and slot shapes. In order to achieve wider operation bandwidth both of the designed antennas have round corners on the wide slot and patch. Meanwhile, the proposed antennas exhibit almost omnidirectional radiation patterns, relatively high gain, and low cross polarization. A comprehensive numerical sensitivity analysis has been done to understand the effects of various dimensional parameters and to optimize the performance of the designed antennas. Results for reflection coefficient, far-field E and H-plane radiation patterns, and gain of the designed antennas are presented and discussed. At the end, we compare the simulated and measured results and found the enhancement of bandwidth of E-shape microstrip antenna. Abstract-Two printed wide-slot antennas with E-shaped patches and slots, for broadband applications, are proposed. They are fed by a coplanar waveguide (CPW) and a microstrip line with almost the same performances. Detailed simulation and experimental investigations are conducted to understand their behavior and optimize for broadband operation. Good agreement between the measurement and simulation has been achieved. The impedance bandwidths, determined by 10-dB reflection coefficient, of the proposed slot antennas fed by microstrip line and CPW are examined from both measurement and simulation. We have obtained the large operating bandwidth by choosing suitable combinations of feed and slot shapes. In order to achieve wider operation bandwidth both of the designed antennas have round corners on the wide slot and patch. Meanwhile, the proposed antennas exhibit almost omnidirectional radiation patterns, relatively high gain, and low cross polarization. A comprehensive numerical sensitivity analysis has been done to understand the effects of various dimensional parameters and to optimize the performance of the designed antennas. Results for reflection coefficient, far-field E and H-plane radiation patterns, and gain of the designed antennas are presented and discussed. At the end, we compare the simulated and measured results and found the enhancement of bandwidth of E-shape microstrip antenna.
Study of Microstrip Slotted Antenna for Bandwidth Enhancement
Global Journal of Research In Engineering, 2012
Two printed wide-slot antennas with E-shaped patches and slots, for broadband applications, are proposed. They are fed by a coplanar waveguide (CPW) and a microstrip line with almost the same performances. Detailed simulation and experimental investigations are conducted to understand their behavior and optimize for broadband operation. Good agreement between the measurement and simulation has been achieved. The impedance bandwidths, determined by 10-dB reflection coefficient, of the proposed slot antennas fed by microstrip line and CPW are examined from both measurement and simulation. We have obtained the large operating bandwidth by choosing suitable combinations of feed and slot shapes. In order to achieve wider operation bandwidth both of the designed antennas have round corners on the wide slot and patch. Meanwhile, the proposed antennas exhibit almost omnidirectional radiation patterns, relatively high gain, and low cross polarization. A comprehensive numerical sensitivity an...
Bandwidth enhancement of rectangular microstrip patch antenna using slots
In this paper, a new design of rectangular microstrip patch antenna (RMPA) without slot, with slots and array is proposed and analyzed. The designed antenna has been simulated using HFSS software. The simulated results for return loss, radiation pattern and gain are presented and discussed. The bandwidth of proposed antenna is 2.4GHz-5.9GHz for VSWR(voltage standing wave ratio)<2 is achieved on the basis of <-10dB return loss as an acceptable reference in wireless applications which cover worldwide interoperability for microwave access (WiMAX) and wireless local area network (WLAN) and other applications. Gain of 10dB is achieved for antenna array.
Investigation of Wide-Band Microstrip Slot Antenna
IEEE Transactions on Antennas and Propagation, 2004
This paper presents the simulation and experimental investigations of a printed microstrip slot antenna. It is a quarter wavelength monopole slot cut in the finite ground plane edge, and fed electromagnetically by a microstrip transmission line. It provides a wide impedance bandwidth adjustable by variation of its parameters, such as the relative permittivity and thickness of the substrate, width, and location of the slot in the ground plane, and feed and ground plane dimensions. The ground plane is small, 50 mm 80 mm, and is about the size of a typical PC wireless card. At the center frequency of 3.00 GHz, its width of 50 mm is about 2 and influences the slot impedance and bandwidth significantly. An impedance bandwidth (11 = 10 dB) of up to about 60% is achieved by individually optimizing its parameters. The simulation results are confirmed experimentally. A dual complementary slot antenna configuration is also investigated for the polarization diversity.
Enhancing the Bandwidth of a Microstrip Patch Antenna using Slots Shaped Patch
2013
In this work, three different geometry shapes, the U, E and H are developed from a rectangular patch of the width (W) = 32mm and length (L) = 24mm. The proposed antennas are simulated using Sonnet software and the results compared with the conventional rectangular patch antenna. The results obtained clearly show that, bandwidth of conventional rectangular microstrip antenna can be enhanced from 4.81% (100MHz) to 28.71% (610 MHz), 28.89% (630MHz) and 9.13% (110MHz) respectively using U, E and H-patch over the substrate. The E-shaped patch antenna has the highest bandwidth followed by U-shaped patch antenna and Hshaped patch antenna. The substrate material used for the proposed antennas is Alumina 96%, with the dielectric constant of 9.4 and loss tangent of 4.0e-4. The proposed antennas may find applications in Wireless Local Area Network (WLAN).
Microstrip Patch Antenna Using Combined Slots for Bandwidth Enhancement and Size
2020
Patch antenna which is used at satellite, space, defense etc. has been proposed. Techniques for improving bandwidth is proposed by modifying the physical shape. Microstrip patch antenna which is coaxially fed is designed by etching square, rectangular and polygon shaped slots on the radiating patch and ground plane for miniaturization and for improving bandwidth. The proposed designs simulated and analysed by using the High Frequency Structure Simulator software. The proposed antenna performance is demonstrated in terms of various parameters like effective reduction of size, VSWR, bandwidth, gain and radiation efficiency. The Proposed antenna starts to resonate of the electromagnetic spectrum and provides reduced VSWR of 0.99. The size of the radiating patch has been considerably reduced approximately by 39.2 % when compared to normal patch antenna and an impedance bandwidth of 285 MHz is also achieved. We obtain a considerable change in results in gain, frequency and bandwidth by i...
A Slotted Rectangular Microstrip Patch Antenna for Wideband Wireless Applications
International Journal of Engineering and Technology, 2017
This paper presents the utilization of slots with full and partial ground plane in rectangular Microstrip Patch Antenna (MPA). The partial ground plane has been introduced to increase the bandwidth of designed antenna. Proposed antenna is designed on FR4 glass epoxy substrate with 1.6mm thickness and dielectric constant 4.4. Designing and simulation has been carried out by using HFSS V13 software. MPA with full ground plane works on four resonant frequency bands, but the value of gain and bandwidth is less. Proposed antenna with varying partial ground plane has been designed and observed that it adorns the optimal results at ground length 12mm. The MPA with partial ground plane with ground length 12mm works on two resonant frequency bands (2.21GHz and 7.06GHz) with the value of gain (3.92dB and 4.71dB) and bandwidth (949MHz and 1030MHz) respectively. These values are at the acceptable level which meets the requirement of wireless application such as bluetooth (2.41-2.49GHz) and point to point high speed wireless communication (5.92-8.5GHz). Keyword-MPA, FR4, HFSS, bluetooth, slotted patch, microstrip I. INTRODUCTION Microstrip patch antennas have been widely used in the field of wireless communications like mobile, radar and satellite because of its unique features such as compact size, ease of fabrication, low profile, less weight and ease of installation [2]. Now days, the antenna with multiband and wideband characteristics are more preferred in the wireless systems [3]. These antennas are capable of working on different applications when installed on wireless devices. By the use of multiband or wideband antennas a single device can be used for various wireless applications under specified range of frequencies [4]. Due to these features and large demand, microstrip antennas become a major area of research for the researchers [5]. Numerous researches have been carried out in recent years by the researchers to achieve multiband and wideband applications [6]. Slotted patch antennas are designed to achieve multiband characteristics [7]. But few drawbacks have been observed in this antenna design such as it exhibits less bandwidth and less value of gain [8]. To remove these drawbacks the work has been done on the ground plane of antenna because it acts as impedance matching circuit for the antenna [9]. Partial ground plane [10], defected ground plane [9], and slotted ground plane have been designed by many researchers to achieve wideband characteristics and high value of gain for different wireless standards [11]. These antennas can be capable of work under various wireless applications such as WiMAX, WLAN, Wi-fi, bluetooth, satellite communication and radar communication [12]. In this paper slotted rectangular patch antenna is designed for wideband applications. Proposed design is analysed for both the multiband and wideband characteristics by using full and partial ground plane. Detailed design and simulated results of proposed antenna with the variation in ground plane is discussed in section 2 and 3. II. ANTENNA DESIGN AND CONFIGURATION The proposed antenna uses the FR4 glass epoxy substrate board with the thickness of 1.6mm and dielectric constant 4.4. Proposed antenna is designed by using the frequency of 2.5GHz, which lie in the range of bluetooth application. Dimensions of the rectangular patch have been calculated by using the equations (1) to (5) as shown below [1]. By using these equations the length and width of proposed antenna is found to be 28.2mm and 36.5mm respectively. The line feeding technique is used to provide the excitation to the designed antenna and the position of feed is optimized to get a good impedance matching, hence located at the centre below the radiating element as shown in Fig. 1(a). Full ground plane with length and width equal to the dimensions of the substrate is shown in Fig. 1(b) and partial ground plane with width 45.6mm and length 10mm is shown in Fig. 1(c). In the proposed antenna design the slots has been introduced to obtain the novel structure of microstrip antenna. The exact position and the symmetry between the slots are very necessary to obtain the accurate results from the designed antenna. These slots help the antenna to exhibit multiband characteristics and are also helpful in increasing the gain and bandwidth of antenna. Process of designing the slots and positioning the slots in the
Design and study of a microstrip slot antenna operating at 2.8/3.1/3.6/4.7/5.4 GHz
MATEC Web of Conferences, 2017
A novel design of a multi band microstrip antenna is presented in this work. The double modified U slots planar patch antenna is designed, simulated and fabricated to operate at 2.8 GHz (between 2.794 to 2.846 GHz), at 3.1 GHz (between 3.145 to 3.196 GHz), at 3.6 GHz (between 3.56 to 3.3.644 GHz), at 4.7 GHz (between 4.684 to 4.772 GHz) and at 5.4 GHz (between 5.423 to 5.526 GHz) for WiMAX/WLAN applications. One of the main challenges was keeping a low profile and low cost substrate (1.2mm and FR4 respectively) with penta-band frequency response without scarifying these characteristics. Each resonant frequency is accomplished by modifying each U slot and patch radiator itself. Simulations had been conducted using HFSS software and measured parameters such as reflection coefficient (S11 parameter) was performed with a vector network analyzer. Measured results confirm simulated results that the antenna could work within mentioned frequencies. Parametric study was conducted in order to study the effect of slots variation over the design.
DESIGN OF V-SLOTTED MICROSTRIP PATCH ANTENNA FOR YIELDING IMPROVED GAIN BANDWIDTH PRODUCT
In this paper, a novel antenna design for improvement of patch antenna gain and bandwidth has been proposed.The proposed antenna design is a V-slotted rectangular microstrip patch antenna for yielding improved gain bandwidth product suitable for WLAN and Wi-Max applications. The antenna operates at 5.9 GHz and has the maximum achievable bandwidth obtained about 1.04Ghz and gain of 6.22dBi .The microstrip patch is constructed using a single layer RT/duroid (5880) substrate, having dielectric constant εr = 2.2 and loss tangent tan δ =0.001.A co-axial feed is used and the antenna is simulated using IE3D software from Zeland based on method of moments.
Design of Narrow Slotted Rectangular Microstrip Antenna
This paper presents a design of narrow slotted rectangular microstrip antenna and experimentally studied on Ansoft Designer v-2.2.0 software. This design technology is achieved by cutting all three slots in microstrip antenna and placing a single coaxial feed. Rectangular patch antenna is designed on a FR4 substrate of thickness 1.6 mm and relative permittivity of 4.4 and mounted above the ground plane at a height of 3 mm. Bandwidth as high as 13.78% are achieved with stable pattern characteristics, such as gain and cross polarization, within its bandwidth. Impedance bandwidth, antenna gain and return loss are observed for the proposed antenna. Details of the measured and simulated results are presented and discussed.