scholarly journals A Compact Dual-Band Printed Antenna Design for LTE Operation in Handheld Device Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Ding-Bing Lin ◽  
Jui-Hung Chou ◽  
Son-On Fu ◽  
Hsueh-Jyh Li
Keyword(s):  
Reflection Coefficient ◽  
Frequency Band ◽  
Ground Plane ◽  
Low Frequency ◽  
Dual Band ◽  
Handheld Devices ◽  
Printed Antenna ◽  
Handheld Device ◽  
Path Lengths ◽  
Definition Of

A novel internal printed antenna suitable for triple long-term evolution (LTE) bands for handheld devices is presented. The operating bandwidths of the design are LTE700 (698~800 MHz), LTE2300 (2300~2400 MHz), and LTE2500 (2500~2690 MHz). Through the use of a C-shape broadside coupled feed structure, full operation in the lower band is achieved. The antenna itself uses two unequal path lengths to produce a low frequency band with two resonant modes. The required bandwidth is then adjusted using a couple feed, and finally placed over a ground plane via another C-type coupling element in order to enhance the two low-frequency matches. In the definition of the −6 dB reflection coefficient, the bandwidth of two basic modes in the low frequency band is 0.689~0.8 GHz. We adopt the definition of the −10 dB reflection coefficient for the high frequency mode, and its working frequency bands are shown to be 2.3~2.72 GHz. The antenna size is only 40 × 12 × 0.8 mm3with a ground plane of 98 × 40 mm2.

scholarly journals Dual Notched-Band Crescent Moon Dielectric Resonator Antenna

2021 ◽  
Vol 25 (1) ◽  
pp. 11-19
Author(s):  
Mohamed Debab ◽  
◽  
Amina Bendaoudi ◽  
Zoubir Mahdjoub ◽  
◽  
...  
Keyword(s):  
Frequency Band ◽  
Dielectric Resonator ◽  
Satellite Communication ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Printed Antenna ◽  
Antenna Structure

In this article, a dual-band notched ultra-wideband (UWB) dielectric resonator antenna is proposed. The antenna structure consists of Crescent Moon Dielectric Resonator (CMDR) fed by a stepped microstrip monopole printed antenna, partial ground plane, and an I-shaped stub. The Crescent Moon dielectric resonator is placed on the microstrip monopole printed antenna to achieve wide impedance bandwidth, and the I-shaped stub is utilized to improve impedance bandwidth for the WiMAX band. A comprehensive parametric study is carried out using HFSS software to achieve the optimum antenna performance and optimize the bandwidth of the proposed antenna. The entire band is useful with two filtered bands at 5.5 GHz and 6.8 GHz by the creation of notches. The band’s rejection, WLAN band (5.2–5.7 GHz), and the downlink frequency band of ITU 7 GHz-band for satellite communication (6.5–7.3 GHz) is realized by inserting G-shaped and C-shaped slots in the ground. The simulation results demonstrate that the proposed CMDR antenna achieves satisfactory UWB performance, with an impedance bandwidth of around 88.7%, covers the frequency band of 3.2 - 8.3 GHz, excluding a rejection band for the WLAN and ITU 7 GHz band. The CMDR is simulated using HFSS and CST high-frequency simulators.

Dual-band low-profile planar antenna for mobile communication application

2015 ◽  
Vol 9 (2) ◽  
pp. 447-452 ◽  
Author(s):  
Xi-Wang Dai ◽  
Tao Zhou ◽  
Bo-Ran Guan
Keyword(s):  
Frequency Band ◽  
Mobile Communication ◽  
High Frequency ◽  
Microstrip Line ◽  
Low Frequency ◽  
Dual Band ◽  
Planar Antenna ◽  
Frequency Resonance ◽  
Low Profile ◽  
High Frequency Resonance

A novel dual-band planar antenna with a low profile for mobile communication system is proposed in this paper. The antenna is composed of one shorted patch with two radiating notches for low frequency resonance and one square patch for high frequency resonance. The low profile is achieved via the shorting patch, which introduces the parallel electrical field between the reflector and antenna. A step-impedance microstrip line is used to feed the antenna. The coupling between the square patch and microstrip line cancels out the inductance of shorting probe, which increases the working bandwidth of proposed antenna. A prototype with a low profile of 0.0286λ is fabricated and measured. The antenna achieves dual impedance bandwidths of 1.6% for the low frequency band and 60% for the high frequency band, covering the frequency range 851–865 MHz and 1.97–3.65 GHz, respectively. The measured results show good agreements with the simulated ones.

scholarly journals Miniaturized Coupling Structures for Decoupling PIFAs on Handheld Devices

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Qian Li ◽  
Yaxin Yu
Keyword(s):  
Electromagnetic Field ◽  
Correlation Coefficient ◽  
Dielectric Layer ◽  
Mutual Coupling ◽  
Ground Plane ◽  
Measured Data ◽  
Handheld Devices ◽  
Handheld Device ◽  
Small Spacing ◽  
Thin Dielectric Layer

One efficient approach is introduced in this paper to reduce mutual coupling and correlation coefficient for two closely placed PIFAs in a handheld device. The approach is based on one miniaturized structure which consists of two metallic layers, printed on either side of one thin dielectric layer. Due to the small spacing between two conducting patches, high electromagnetic field is induced within the dielectric layer. The geometry and position of this structure have been modified to decouple the PIFA array at 1.9 GHz and produce maximum miniaturization thereby occupying less space on a handheld device ground plane. By employing the proposed structures, a 20 dB reduction in mutual coupling is achieved. The correlation coefficient also reduces to 0.007278. The performance of the structure is validated by both simulated results and measured data obtained from several fabricated prototypes.

scholarly journals Compact Dual-Band Antenna with Paired L-Shape Slots for On- and Off-Body Wireless Communication

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7953
Author(s):  
Sarosh Ahmad ◽  
Adnan Ghaffar ◽  
Niamat Hussain ◽  
Nam Kim
Keyword(s):  
Frequency Band ◽  
Patch Antenna ◽  
Specific Absorption Rate ◽  
Ground Plane ◽  
Dual Band ◽  
Physical Layers ◽  
Dual Band Antenna ◽  
Lower Frequency Band ◽  
And Performance ◽  
The Impact

A simple dual-band patch antenna with paired L-shap slots for on- and off-body communications has been presented in this article. The proposed antenna resonates in the industrial, scientific, and medical (ISM) band at two different frequencies, at 2.45 GHz and 5.8 GHz. At the lower frequency band, the antenna’s radiation pattern is broadsided directional, whereas it is omni-directional at the higher frequency band. The efficiency and performance of the proposed antenna under the influence of the physical body are improved, and the specific absorption rate (SAR) value is significantly reduced by creating a full ground plane behind the substrate. The substrate’s material is FR-4, the thickness of which is 1.6 mm and it has a loss tangent of tanδ = 0.02. The overall size of the proposed design is 40 mm × 30 mm × 1.6 mm. Physical phantoms, such as skin, fat and muscle, are used to evaluate the impact of physical layers at 2.45 GHz and 5.8 GHz. The SAR values are assessed and found to be 0.19 W/kg and 1.18 W/kg at 2.45 GHz and 5.8 GHz, respectively, over 1 gram of mass tissue. The acquired results indicate that this antenna can be used for future on- and off-body communications and wireless services.

scholarly journals Design of Dual Notch UWBMIMO Antenna with Defected Ground Structure.

2019 ◽  
Vol 9 (2S3) ◽  
pp. 318-322
Keyword(s):  
Dielectric Constant ◽  
Frequency Band ◽  
Ground Plane ◽  
Radiation Efficiency ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Maximum Gain ◽  
Notch Band

In this paper A dual band notched MIMO antennais designed with defected ground structure as ground plane and its characteristics are analyzed. The antenna covers UWB frequency ranging from 3.1-10.6 GHz with single notch band characteristics with maximum gain of 3.7 dB. The antenna provides radiation efficiency of 94% with front to back to ratio of 64%. The simulated studied is carried for many frequency band applications. The designed antenna shows patterns similar to that of a the dipole. The substrate used to design this antenna is FR4 withdimensions of 26mm x40mmx1.6mm and dielectric constant of 4.4.The notch bands are at WLAN and WiMax frequencies.

scholarly journals Design of Dual Band Antenna with Defects on Patch and Ground for Wireless Applications

2019 ◽  
Vol 8 (2) ◽  
pp. 261-264
Keyword(s):  
Reflection Coefficient ◽  
Frequency Band ◽  
Patch Antenna ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Band Frequency ◽  
Wireless Applications ◽  
Rectangular Patch ◽  
Dual Band Antenna ◽  
Simulation Results

In this paper, a rectangular patch antenna with slits for dual band capabilities is presented. The suggested antenna works for two frequencies which are at 2.5 GHz and 5.1 GHz. The first operating frequency is in the band of 2.3 to 2.7GHz with -16.8dB reflection coefficient at 2.5GHz resonating frequency, whereas the second band is 4.6 to 5.5GHz with -29.2dB reflection coefficient at 5.1GHz resonating frequency. The simulation results exhibit that, the suggested antenna works for dual band frequency having impedance bandwidth of 482 and 844 MHz respectively. The gain is observed as 2.9 dBi and 4.2 dBi of respective bands. The first frequency band can be used for Industrial, Scientific and Medical(ISM) applications and second frequency band can be used for C-band applications.

scholarly journals CSRR based patch antenna for Wi-Fi and WiMAX Applications

2018 ◽  
Vol 7 (3) ◽  
pp. 40-45 ◽  
Author(s):  
S. Nelaturi ◽  
N.V.S.N. Sarma
Keyword(s):  
Frequency Band ◽  
Patch Antenna ◽  
Low Frequency ◽  
Axial Ratio ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Left Handed ◽  
Dual Band Antenna

In this paper, a novel compact microstrip patch antenna is proposed for Wi- Fi and WiMAX bands. To achieve miniaturization the dimensions of the square radiating patch are chosen with reference to the high frequency band (3.3 GHz). The dual band is achieved by loading a Complementary Split Ring Resonator (CSRR) into the radiating patch. The left handed nature of the CSRR is the cause for low frequency band (2.4 GHz). To improve the return loss bandwidth and axial ratio bandwidth at upper band the fractal concept is introduced along the edges of the square patch. Thus a low volume dual band antenna is simulated using HFSS. A comparison with measured data is also presented. The fabricated antenna is found to be occupying 25% less volume (with reference to 2.4 GHz) than existing antennas which is mainly due to the blending of the two recent concepts ‘metamaterials and fractals’.

Compact Design of an UWB Antenna with Dual Band-Notched Characteristic

2012 ◽  
Vol 195-196 ◽  
pp. 13-16
Author(s):  
Wen Bo Zeng ◽  
Jia Zhao ◽  
Bao Zhong Ke ◽  
Qi Qi Wu
Keyword(s):  
Frequency Band ◽  
Printed Circuit Board ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Circuit Board ◽  
Dual Band ◽  
Uwb Antenna ◽  
Compact Design

An ultra-wideband (UWB) printed antenna with dual band-notched characteristic is presented in this paper. The proposed antenna is composed of a semi-circular patch fed by a tapered coplanar waveguide (CPW) and an unclosed ground plane, which are printed onto the same side of a FR4 printed circuit board (PCB) with an overall size of 30 mm × 30 mm × 1.5 mm. By embedding a simple arc-shaped slot in the patch and adding a T-shaped strip on the top of the patch, two notched frequency bands for rejection of WiMAX and WLAN system can be realized. The characteristics of the proposed antenna are investigated by using the software HFSS and validated experimentally, both simulated and measured results show that the proposed antenna prototype achieves good impedance matching over an frequency band from 2.1011.40 GHz for VSWR2 with two notched bands over the frequency range of 5-5.95 GHz and 3.1-3.9 GHz. Furthermore, a relatively stable gain and suitable radiation patterns are also achieved in both lower and upper UWB frequency band.

Design of a Compact UWB Antenna Using Two Modified U-Shaped Slots for Satellite Frequency Rejection in C-Band and X-Band

2014 ◽  
Vol 538 ◽  
pp. 189-192
Author(s):  
Li Li ◽  
Zhang Zhuo Zhao ◽  
Xiao Li Yin
Keyword(s):  
Frequency Band ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Dual Band ◽  
Uwb Antenna ◽  
Total Size ◽  
Compact Structure ◽  
X Band

A novel printed microstrip-fed monopole antenna with a dual band notched characteristic has been designed and analyzed. The antenna has a rather compact structure with total size of 18×12×1.6mm3. Band notched has been created by inserting slot on the radiating patch and on the microstrip. Wide impendence bandwidth is produced by modify the ground plane. Good radiation performance is achieved in the frequency band of 3 to over 13 GHz with dual band notched of 3.7-4.2 and 7.0-8.0 GHz.

Design of a Five-Band Internal Antenna for Handsets

Frequenz ◽  
2012 ◽  
Vol 66 (7-8) ◽  
Author(s):  
Anfu Zhu ◽  
Jianxing Li ◽  
Anxue Zhang ◽  
Yansheng Jiang
Keyword(s):  
Frequency Band ◽  
High Frequency ◽  
Ground Plane ◽  
Low Frequency ◽  
Radiation Patterns ◽  
High Frequency Band ◽  
Rectangular Slot ◽  
Proper Size ◽  
Internal Antenna

AbstractA novel compact five-band internal handset antenna covering LTE (746–806 MHz), GSM850 (824–894 MHz), GSM900 (890–960 MHz), DCS (1710–1880 MHz) and PCS (1850–1990 MHz) bands is presented. To enhance the bandwidths of the proposed antenna both at the low frequency band and high frequency band, a rectangular slot with a proper size is removed in the ground plane at an appropriate location. Both the simulated results and measured results show that reasonable radiation patterns and antenna gains for each frequency band are achieved.

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