scholarly journals Design and Implementation of Low Profile Antenna for Dual-Band Applications Using Rotated E-Shaped Conductor-Backed Plane

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Mahdi Jalali ◽  
Tohid Sedghi ◽  
Shahin Shafei
Keyword(s):  
Impedance Matching ◽  
Ground Surface ◽  
Dual Band ◽  
Handheld Devices ◽  
Impedance Bandwidth ◽  
Low Profile ◽  
X Band ◽  
Compact Size ◽  
Proper Values ◽  
5 Ghz

A novel configuration of a printed monopole antenna with a very compact size for satisfying WLAN operations at the 5.2/5.8 GHz and also for X-band operations at the 10 GHz has been proposed. The antenna includes a simple square-shaped patch as the radiator, the rotated U-shaped conductor back plane element with embedded strip on it, and the partial rectangular ground surface. By using the rotated U-shaped conductor-backed plane with proper values, good impedance matching and improvement in bandwidth can be achieved, at the lower and upper bands. The impedance bandwidth forS11<-10 dB is about 1.15 GHz for 5 GHz band and 5.3 GHz for X-band. The measured peak gains are about 1.9 dBi at WLAN-band and 4.2 dBi at X-band. The experimental results represent that the realized antenna with good omnidirectional radiation characteristics, enough impedance bandwidth, and reasonable gains can be appropriate for various applications of the future developed technologies and handheld devices.

Low profile dual band-stop super wideband printed monopole antenna with polarization diversity

2019 ◽  
Vol 11 (7) ◽  
pp. 694-702
Author(s):  
Murli Manohar ◽  
Rakhesh Singh Kshetrimayum ◽  
Anup Kumar Gogoi
Keyword(s):  
Local Area Network ◽  
Monopole Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Polarization Diversity ◽  
Low Profile ◽  
Compact Size ◽  
Printed Monopole Antenna ◽  
Printed Monopole

AbstractA low profile super-wideband polarization diversity printed monopole antenna with dual band-notched characteristics is presented the first time. The designed antenna comprises two arched shaped radiating elements with two triangular tapered microstrip feed lines (TTMFL) and two arched shaped partial ground planes, which covers an enormously wide impedance bandwidth (BW) from 1.2 to 25 GHz (ratio BW of 20.8:3) for reflection coefficient |S11| < −10 dB. To ensure the high port isolation (better than − 30 dB) between two feeding ports over the whole bands, two analogous antennas have been kept perpendicular to each other at a distance of 1 mm. In addition, the dual band-notched performance in wireless local area network (5–6 GHz) and X-band (7.2–8.5 GHz) is generated by employing a pair of open-circuited stubs (L-shaped stub and horizontal stub) to the TTMFL. Envelop correlation coefficient has been computed to study the polarization diversity performance. Finally, the proposed antenna was fabricated and tested successfully. Measured results indicate that the proposed antenna is an appropriate candidate for the polarization diversity applications. The proposed antenna has a compact size of 40 × 70 × 0.787 mm3, high isolation, and occupies a small space compared with the existing antennas.

Miniaturized printed monopole antenna with applying the modified conductor-backed plane and three embedded strips based on CPW for multi-band telecommunication devices

2014 ◽  
Vol 8 (8) ◽  
Author(s):  
Mohammad Alibakhshi-Kenari
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Surface ◽  
Monopole Antenna ◽  
Coaxial Cable ◽  
Dual Band ◽  
Ieee 802.11A ◽  
X Band ◽  
Printed Monopole Antenna ◽  
Printed Monopole

In this article, a new construction of a small planar dual-band fed printed monopole antenna based on coplanar waveguide is suggested. Impedance matching for dual-band operations is obtained by embedding three vertical strips with different sizes in the U-shaped conductor-backed plane. The main problem of the designed antenna is the measuring of the specifications with the Agilent 8722ES Vector Network Analyzer, when the coaxial cable is connected to the antenna. Hence, in this paper a new method for decoupling the cable from the antenna is presented. This method is based on using the ferrite bead. The ferrite bead reduces the cable radiation, so that its position plays the important part in the antenna radiation characteristics. The fabricated antenna includes the benefits of the miniaturized size and dual-band operating specifications, so that the mentioned properties have been achieved without modifying the coplanar-waveguide-ground surface or radiator patch. The antenna has the small size of 15 × 15 × 0.8 mm3and bandwidths with S11 < −10 dB about 2.2 GHz (5.05–7.25 GHz) for WLAN-band or IEEE 802.11a-band and 5.2GHz (7.6–12.8 GHz) for X-band, which correspond to 36 and 51% practical bandwidths, respectively. The antenna measured peak gains are about 1.8 dBi at WLAN-band and 4.3 dBi at X-band.

scholarly journals Compact slot based triangular multiband microstrip patch antenna for C and X band applications

2021 ◽  
Author(s):  
BALAMURUGAN C ◽  
Marichamy P
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Superior Performance ◽  
Triangular Patch ◽  
X Band ◽  
Compact Size ◽  
Resonance Frequencies ◽  
Communication Devices ◽  
Portable Communication ◽  
5 Ghz

Abstract Modern portable communication devices require a compact antenna with superior performance and lower weight and size. The design and development of such a compact size antenna is a major challenge for the researchers. In this proposed work compact slot based triangular patch antenna to work at the multiple resonance frequencies from 5 GHz to 10 GHz using FR4 substrate is presented. Proposed antenna is simulated using High Frequency Structural Simulator (HFSS 2020R1). Simulated and fabricated antenna test results shows that proposed antenna can be suitably employed for the portable wireless transceivers in C and X band. Proposed slot based triangular patch antenna achieves the peak gain of 8 dBi and has the good impedance matching properties such that return loss S11is less than -10 dB and VSWR value is very closer to 1 at all the resonance frequencies.

scholarly journals A Wide Dual-Band Metamaterial-Loaded Antenna for Wireless Applications

2020 ◽  
Vol 20 (1) ◽  
pp. 23-30
Author(s):  
Sulakshana Chilukuri ◽  
Srividya Gundappagari
Keyword(s):  
Basic Structure ◽  
Local Area ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Resonant Frequencies ◽  
Interdigital Capacitor ◽  
Rectangular Patch ◽  
Dual Band Antenna ◽  
Compact Size ◽  
5 Ghz

A compact, wide dual-band antenna designed to resonate at 2.25 GHz and 5.4 GHz is proposed in this paper. The proposed antenna is a monopole rectangular patch designed to operate at 5 GHz. This basic structure is modified by introducing a metamaterial-based interdigital capacitor reactive loading that exhibits dual-band characteristics at 2.25 GHz and 5.4 GHz. A bandwidth greater than 1.4 GHz at the two resonant frequencies is obtained. The compact size of the proposed antenna is 0.0989λ<sub>0</sub> × 0.0498λ<sub>0</sub>, where λ<sub>0</sub> is calculated at the first resonance. The antenna is etched on a FR4 substrate with dielectric constant <i>ɛ</i><sub><i>r</i></sub> = 4.4 and thickness of 1.6 mm. The simulated results exhibit considerable gain and wide impedance bandwidth at the resonant frequencies. Monopole-like radiation patterns are obtained at both the operating frequencies. The designed antenna can be applied in wireless local area networks and Wi-MAX wireless communications.

scholarly journals Analysis and design of a compact ultra-wideband antenna with WLAN and X-band satellite notch

2020 ◽  
Vol 10 (4) ◽  
pp. 4261
Author(s):  
Mohssine El Ouahabi ◽  
Aziz Dkiouak ◽  
Alia Zakriti ◽  
Mohamed Essaaidi ◽  
Hanae Elftouh
Keyword(s):  
Satellite Communication ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Ring Resonators ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Geometrical Parameters ◽  
Analysis And Design ◽  
X Band ◽  
Compact Size

<span lang="EN-US">A compact design of ultra-wideband (UWB) antenna with dual band-notched characteristics based on split-ring resonators (SRR) are investigated in this paper. The wider impedance bandwidth (from 2.73 to 11.34 GHz) is obtained by using two symmetrical slits in the radiating patch and another slit in the partial ground plane. The dual band-notch rejection at WLAN and X-band downlink satellite communication system are obtained by inserting a modified U-strip on the radiating patch at 5.5 GHz and embedding a pair of rectangular SRRs on both sides of the microstrip feed line at 7.5 GHz, respectively. The proposed antenna is simulated and tested using CST MWS high frequency simulator and exhibits the advantages of compact size, simple design and each notched frequency band can be controlled independently by using the SRR geometrical parameters. Therefore, the parametric study is carried out to understand the mutual coupling between the dual band-notched elements. To validate simulation results of our design, a prototype is fabricated and good agreement is achieved between measurement and simulation. Furthermore, a radiation patterns, satisfactory gain, current distribution and VSWR result at the notched frequencies make the proposed antenna a suitable candidate for practical UWB applications.</span>

scholarly journals Compact Broadband Circularly Polarized CPW-Fed Antenna with Characteristic Mode Analysis

2022 ◽  
Vol 2022 ◽  
pp. 1-11
Author(s):  
Wei Xu ◽  
Jingchang Nan ◽  
Mingming Gao
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Mode Analysis ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Characteristic Mode ◽  
Circularly Polarized ◽  
Low Profile ◽  
Compact Size

A compact circularly polarized (CP) antenna is proposed for low-profile and wideband operation based on characteristic mode analysis (CMA). A ring patch with a gap and two arc-shaped metallic stubs as the radiator is analyzed and optimized by CMA to figure out the orthogonal modes and operating frequency band for potential good axial ratio (AR) performance. The studies of these CP modes provide a physical insight into the property of broadband circular polarization. Such an in-depth understanding paves the way for the proposal of novel CP antenna with separation between the design of radiator and feeding network. A 50-Ω coplanar waveguide (CPW) is introduced and placed appropriately to excite the desired modes based on the information from CMA, which employs two asymmetric ground planes to improve the performance in terms of AR and impedance matching. The antenna with a compact size of 0.71λ0 × 0.76λ0 × 0.038λ0 (λ0 is the free-space wavelength at the center frequency of the 3-dB AR bandwidth) is fabricated and measured for validation. The realized gain varies from 1.6 to 3.1 dBic over the operating bandwidth characterized by the measured 10-dB impedance bandwidth of 83.8% (3.98–9.72 GHz) and 3-dB AR bandwidth of 70.3% (4.59–9.57 GHz), respectively.

scholarly journals Low-Profile Folded-Coupling Planar Inverted-F Antenna for 2.4/5 GHz WLAN Communications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hung-Yu Li ◽  
Chun-Cheng Lin ◽  
Tsai-Ku Lin ◽  
Chih-Yu Huang
Keyword(s):  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Dual Band ◽  
Handheld Devices ◽  
Area Network ◽  
Coupling Technique ◽  
Design Procedures ◽  
Low Profile ◽  
5 Ghz

A dual-band folded-coupling planar inverted-F antenna (FC-PIFA) is presented in this paper. By using the folded-coupling technique, the proposed antenna provides two distinct impedance bandwidths of 159 MHz (about 6.5% centered at 2.45 GHz) and 1512 MHz (about 27.5% centered at 5.5 GHz), which cover the required bandwidths for the 2.4/5 GHz wireless local area network (WLAN) communications. Moreover, the antenna shows a low profile of 5 mm and a small length of 20.5 mm in radiating area, making it easy to be installed in the casing of wireless handheld devices and laptops. Details of the design procedures and experimental results are discussed.

Compact dual-band millimeter-wave antenna for 5G WLAN

2021 ◽  
pp. 1-8
Author(s):  
Melvin Chamakalayil Jose ◽  
Sankararajan Radha ◽  
Balakrishnapillai Suseela Sreeja ◽  
Mohammed Gulam Nabi Alsath ◽  
Pratap Kumar
Keyword(s):  
Impedance Matching ◽  
Dielectric Substrate ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Defected Ground Structure ◽  
Compact Structure ◽  
Low Profile ◽  
Millimeter Wave Antenna ◽  
Measured Impedance

Abstract This paper presents a novel compact dual-band printed antenna with an omnidirectional radiation pattern for 5G WLAN. The antenna element comprises a star-shaped patch with six disc-shaped elements at the top and a defected ground structure at the bottom, having a radius of 3.77 mm for both. The proper feeding point and alignment with its element parameters help to achieve good impedance matching. The proposed antenna has a single center feed, a low profile, and a straightforward compact structure without any feeding complexity. A high reception fidelity antenna with comparable bandwidth and moderate gain is presented. The prototype radiator was printed on a 4 mm radius and a 1.6 mm thick dielectric substrate (Rogers RT/Duroid 5880), with a dielectric constant of 2.2. The designed antenna is fabricated and measured to validate the simulation result. The measured impedance bandwidth of 1.3 GHz (27.5–28.8 GHz) and 2.2 GHz (32.45–34.65 GHz) with a respective measured gain of 1.1 and 3.2 dBi are achieved at 28 and 34 GHz. The simulated radiation efficiency of above 95% is achieved for both bands. A good agreement between simulated and measured results of the proposed work shows that the proposed antenna is suitable for 5G short-range WLAN communications.

scholarly journals A Novel Dual Ultrawideband CPW-Fed Printed Antenna for Internet of Things (IoT) Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Qasim Awais ◽  
Hassan Tariq Chattha ◽  
Mohsin Jamil ◽  
Yang Jin ◽  
Farooq Ahmad Tahir ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Design Process ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Antenna Design ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Optimized Design ◽  
Printed Antenna ◽  
Low Profile

This paper presents a dual-band coplanar waveguide (CPW) fed printed antenna with rectangular shape design blocks having ultrawideband characteristics, proposed and implemented on an FR4 substrate. The size of the proposed antenna is just 25 mm × 35 mm. A novel rounded corners technique is used to enhance not only the impedance bandwidth but also the gain of the antenna. The proposed antenna design covers two ultrawide bands which include 1.1–2.7 GHz and 3.15–3.65 GHz, thus covering 2.4 GHz Bluetooth/Wi-Fi band and most of the bands of 3G, 4G, and a future expected 5G band, that is, 3.4–3.6 GHz. Being a very low-profile antenna makes it very suitable for the future 5G Internet of Things (IoT) portable applications. A step-by-step design process is carried out to obtain an optimized design for good impedance matching in the two bands. The current densities and the reflection coefficients at different stages of the design process are plotted and discussed to get a good insight into the final proposed antenna design. This antenna exhibits stable radiation patterns on both planes, having low cross polarization and low back lobes with a maximum gain of 8.9 dB. The measurements are found to be in good accordance with the simulated results.

A Novel Pentagonal Shaped Planar Inverted-F Antenna for Defense Applications

2019 ◽  
Vol 12 (2) ◽  
pp. 95-100
Author(s):  
Purnima Sharma ◽  
Akshi Kotecha ◽  
Rama Choudhary ◽  
Partha Pratim Bhattacharya
Keyword(s):  
Mobile Communication ◽  
Satellite Communication ◽  
Dual Band ◽  
Vehicular Communication ◽  
Radio Frequency Field ◽  
Wireless Applications ◽  
High Frequency Structure Simulator ◽  
Low Profile ◽  
Radar Satellite ◽  
5 Ghz

Background: The Planar Inverted-F Antenna (PIFA) is most widely used for wireless communication applications due to its unique properties as low Specific Absorption Rate, low profile geometry and easy fabrication. In literature a number of multiband PIFA designs are available that support various wireless applications in mobile communication, satellite communication and radio frequency field. Methods: In this paper, a miniature sized planar inverted-F antenna has been proposed for dual-band operation. The antenna consists of an asymmetrical pentagonal shaped patch over an FR4 substrate. The overall antenna dimension is 10 × 10 × 3 mm3 and resonates at 5.7 GHz frequency. A modification is done in the patch structure by introducing an asymmetrical pentagon slot. Results: The proposed pentagonal antenna resonates at 5.7 GHz frequency. Further, modified antenna resonates at two bands. The lower band resonates at 5 GHz and having a bandwidth of 1.5 GHz. This band corresponds to C-band, which is suitable for satellite communication. The upper band is at 7.9 GHz with a bandwidth of 500 MHz. Performance parameters such as return loss, VSWR, input impedance and radiation pattern are obtained and analysed using ANSYS High- Frequency Structure Simulator. The radiation patterns obtained are directional, which are suitable for mobile communication. Conclusion: The antenna is compact in size and suitable for radar, satellite and vehicular communication.

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