scholarly journals A Dual-Band Printed End-Fire Antenna with DSPSL Feeding

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Daofeng Ye ◽  
Yuanxin Li ◽  
Zhixi Liang ◽  
Yunliang Long
Keyword(s):  
Frequency Band ◽  
Dual Band ◽  
Strip Line ◽  
Printed Antenna ◽  
Lower Band ◽  
Parallel Strip ◽  
Lower Frequency Band ◽  
Wideband Transition

A novel dual-band printed end-fired antenna with double-sided parallel-strip line (DSPSL) feeding is presented. The DSPSL acts in wideband transition using balanced transmission. Two different modes of the parasitic patches allow the antenna to work in different bands. The printed antenna is designed as a quasi-Yagi structure to achieve directivity in the lower band, and the parallel rectangular patches serve as the parasitic director. These patches act as radiation patches with end-fire direction characteristics in the upper band. The measured bandwidths were 18.3% for the lower frequency band (2.28–2.74 GHz) and 12.6% for the upper frequency band (5.46–6.2 GHz).

scholarly journals Miniaturized Circularly Polarized Stacked Patch Antenna on Reactive Impedance Surface for Dual-Band ISM and WiMAX Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Kush Agarwal ◽  
Saugata Dutta
Keyword(s):  
Frequency Band ◽  
Patch Antenna ◽  
Axial Ratio ◽  
Dual Band ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Circularly Polarized ◽  
Microstrip Patch ◽  
Lower Band ◽  
Lower Frequency Band

This paper proposes a compact microstrip patch antenna for operating in 2.4 GHz ISM and 3.5 GHz WiMAX bands with circularly polarized (CP) radiation. The CP radiation in dual-bands is a result of two multilayered truncated corner stacked square patches, while the reactive impedance surface (RIS) is used for antenna size miniaturization for the lower operating frequency band. Since the overall lateral antenna dimensions are controlled by the lower frequency band (higher wavelength), reducing the electrical size of the antenna for lower band results in overall smaller antenna dimensions. The measured 3-dB axial ratio bandwidths of the in-house fabricated antenna prototype are 6.1% (2.40–2.55 GHz) for the lower band and 5.7% (3.40–3.60 GHz) for the upper band, while the 10-dBS11bandwidths for the two bands are 8.1% (2.39–2.59 GHz) and 6.9% (3.38–3.62 GHz), respectively. The maximum gain at boresight for the lower band is 2.93 dBic at 2.5 GHz, while the gain for the upper band is 6.26 dBic at 3.52 GHz. The overall volume of the proposed antenna is 0.292λo × 0.292λo × 0.044λo, whereλois the corresponding free-space wavelength at 2.5 GHz.

Compact dual-mode dual-band balun filter using double-sided parallel-strip line

2012 ◽  
Vol 48 (21) ◽  
pp. 1351 ◽  
Author(s):  
W. Jiang ◽  
L. Zhou ◽  
A.M. Gao ◽  
W. Shen ◽  
W.Y. Yin ◽  
...  
Keyword(s):  
Dual Band ◽  
Strip Line ◽  
Dual Mode ◽  
Parallel Strip

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.

A Novel Differential Dual-Band Bandpass Filter Based on Stepped-Impedance Double-Sided Parallel-Strip Line

2011 ◽  
Vol 31 (2) ◽  
pp. 117-126 ◽  
Author(s):  
Xinwei Chen ◽  
Runbo Ma ◽  
Liping Han ◽  
Guorui Han ◽  
Li Li ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Strip Line ◽  
Parallel Strip

Dual‐band GaN power amplifiers with novel DC biasing networks incorporating offset double‐sided parallel strip line

2016 ◽  
Vol 10 (3) ◽  
pp. 271-275 ◽  
Author(s):  
Liming Gu ◽  
Wenquan Che ◽  
Shichang Chen ◽  
Qi Cai ◽  
Mi Zhang ◽  
...  
Keyword(s):  
Power Amplifiers ◽  
Dual Band ◽  
Strip Line ◽  
Parallel Strip ◽  
Dc Biasing

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 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.

Dual-band branch-line coupler using double-sided parallel-strip line

2012 ◽  
Vol 54 (8) ◽  
pp. 1898-1900 ◽  
Author(s):  
Jung-Kyu Lee ◽  
Dong-Jin Jung ◽  
Kai Chang
Keyword(s):  
Dual Band ◽  
Strip Line ◽  
Branch Line ◽  
Parallel Strip

scholarly journals Design of a Compact Dual-Band MIMO Antenna System with High-Diversity Gain Performance in Both Frequency Bands

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 383
Author(s):  
Wazie M. Abdulkawi ◽  
Waqar Ahmad Malik ◽  
Sajjad Ur Rehman ◽  
Abdul Aziz ◽  
Abdel Fattah A. Sheta ◽  
...  
Keyword(s):  
Channel Capacity ◽  
Frequency Band ◽  
Wide Band ◽  
Antenna System ◽  
Dual Band ◽  
Frequency Bands ◽  
Mimo Antenna ◽  
Capacity Loss ◽  
Lower Frequency Band ◽  
Code Division Multiple

A compact four-element dual-band multiple-input and multiple-output (MIMO) antenna system is proposed to achieve high isolation and low channel capacity loss. The MIMO antenna was designed and optimized to cover the dual-frequency bands; the first frequency band is a wide band, and it covers the frequency range of 1550–2650 MHz, while the other frequency band covers the 3350–3650 MHz range. The measured wide-band impedance bandwidths of 1.1 GHz and 300 MHz were achieved in the lower and upper frequency bands, respectively. The proposed structure consists of four novel antenna elements, along with a plus-sign-shaped ground structure on an FR4 substrate. The overall electrical size of the whole dual-band MIMO antenna system is 0.3λ(W) × 0.3λ(L) × 0.008λ(H) for the lower frequency band. It achieved greater than 10 and 19 dB isolation in the lower and upper frequency bands, respectively. The antenna system accomplished an envelope correlation coefficient of |ρ|≤0.08 in the lower frequency band, while it achieved |ρ|≤0.02 in the higher frequency band. The computed channel capacity loss remained less than almost 0.4 bits/s/Hz in both frequency bands. Therefore, it achieved good performance in both frequency bands, with the additional advantage of a compact size. The proposed MIMO antenna is suitable for compact handheld devices and smartphones used for GSM (Global System for Mobiles), UMTS (Universal Mobile Telecommunications Service), WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), 5G sub-6 GHz, PCS (Personal Communications Service), and WLAN (wireless local area network) applications.

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