Design of Compact Ultrawideband Slot Antenna With Improved Band-Edge Selectivity

Yang, Hailong; Xi, Xiaoli; Zhao, Yuchen; Wang, Lili; Shi, Xiaomin

doi:10.1109/lawp.2018.2825453

Cited by 20 publications

(38 citation statements)

References 14 publications

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“…The design is fabricated on an RO-5880 substrate with dielectric constant ɛ r = 2.2 and height of 0.787 mm. Several resonant frequencies and UWB functions are realised by using 50 Ω microstrip feeding line to excite the slot embedded at the centre of the ground plane [12]. The simulated reflection coefficient is shown in Fig.…”

Section: Uwb Antenna With Improved Band-edge Selectivitymentioning

confidence: 99%

“…Although it plays a key role in improving the upper band-edge selectivity, the low-pass feeding line has a negative effect on radiation efficiency. The radiation efficiency of the referenced antenna in [12] was about 80%. Also, the impedance characteristics in the UWB band are not ideal, and the reflection coefficient of the proposed design is only −10 dB.…”

Section: Introductionmentioning

confidence: 99%

“…The demotions the filter antennas are 53 × 22 [10] and 53 × 42 mm [11], which are bigger than most UWB antennas in [1][2][3][4][5][6][7][8][9]. In [12], a slot UWB antenna with good band-edge selectivity using stepped impedance resonator feeding line is proposed. Although it plays a key role in improving the upper band-edge selectivity, the low-pass feeding line has a negative effect on radiation efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The well-designed DGS not only produces transmission zero to obtain good cut-off property in upper sideband but also provides better in-band impedance matching. Second, by the addition of a parasitic slot near the stepped slot, the operating band and the characteristics of frequency selection at low frequency have also been improved [12]. What's more, to filter out some wireless communication systems in the UWB band, such as WLAN and WiMAX, two microstrip lines and feeding line are placed in parallel.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the bias circuit and the notch structure are not directly connected to the radiation patch, which does not affect the overall dimension and performance of the antenna. Compared with the slot antenna in [12], the proposed design with reconfigurable function has many controllable states for different UWB applications.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Compact slot antenna with enhanced band‐edge selectivity and switchable band‐notched functions for UWB applications

Yang

Zhao

et al. 2019

IET Microwaves, Antennas & Propagation

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In this study, a new reconfigurable stepped slot antenna with enhanced band‐edge selectivity of the UWB passband and switchable band‐notched characteristic is presented. Good out‐of‐band rejection and sharp cut‐off at band‐edge are achieved by the use of defected ground structure (DGS) and a parasitic slot near the stepped slot. The well‐designed DGS not only produces transmission zero to obtain good cut‐off property in upper sideband but also provides better impedance matching of in‐band. The frequency range of the proposed antenna is from 3.1 to 11.1 GHz (114%) with the reflection coefficient < − 10 dB. The shape factor is 1.05, which indicates that the proposed design has an excellent selectivity. To obtain the notched band, two passive strip lines near the feeding line are designed. Furthermore, the reconfigurable function with four states can be easily realised by the control of two diodes between the passive strip line and the ground. The structures of the notched band and bias circuit are relatively simple and independent of antenna radiation structure. The performance of the antenna is presented and compared with other competitive antennas. The proposed design has many significant advantages in dimension, good out‐of‐band characteristics, and controllable states for different UWB applications.

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Section: Uwb Antenna With Improved Band-edge Selectivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compact slot antenna with enhanced band‐edge selectivity and switchable band‐notched functions for UWB applications

Yang

Zhao

et al. 2019

IET Microwaves, Antennas & Propagation

Self Cite

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Design and analysis of clover leaf‐shaped fractal antenna integrated with stepped impedance resonator for wireless applications

Palanisamy¹,

Thangaraju²

2022

Int J Communication

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A novel multi-band clover leaf-shaped fractal antenna with integrated filtering to reduce higher order harmonics has been proposed. Existing microstrip filtering antennas endure limited gain, narrow impedance bandwidth, and undesired frequency radiations. The proposed antenna is designated to operate simultaneously in following operating bands: 3.35-3.6 GHz for WiMAX, 5.156-5.825 GHz for WLAN, 5.7-6.4 GHz for Intelligent Transport Systems (ITS), and 7.7-8.5 GHz for ITU-R applications. The proposed patch is realized by combining two semi-fractal ring microstrip patches like the geometry of a three-leaf clover with dual-layered stepped impedance resonator (SIR) integrated at bottom layer of the second substrate. The SIR bandpass filter exhibits odd and even modes suppresses higher order harmonics and undesired radiations. An aperture coupled feeding in the proposed patch offers better bandwidth and impedance matching. The number of iterations is increased to get the desired multiband characteristics. The proposed microstrip fractal antenna has the geometrical dimensions of 50 Â 50 Â 2 mm 3 . It is observed that both the simulated and measured results offers peak gain of >5 dBi and better return loss (S 11 ), that is, 3.3-3.6-GHz band offers S 11 of À33.73 dB, 5.15-5.825-GHz band offers S 11 of À36.69 dB, and 5.795-6.4-GHz band shows the S 11 of À36.25 dB, and for 7.725-8.5 GHz, the return loss is À33.209 dB.Harmonics at 6.42 GHz (1.8f 0 ), 7.37 GHz (1.5f 0 ), and 9.04 GHz (1.73f 0 ) has been suppressed and shows linear polarization in the WLAN band and circular polarization in the ITU-R and WiMAX bands.

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Compact ultrawideband MIMO slot antenna with high isolation

Chen,

Ye,

Jiang

et al. 2024

Int J Communication

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SummaryAn ultrawideband multiple‐input‐multiple‐output (MIMO) slot antenna with a small size and high isolation is introduced. Two multi‐stepped microstrip lines are used to feed the MIMO antenna and the ground plane is designed in a defective structure for achieving good impedance matching in an ultrawide frequency range. A 3T‐shaped strip is utilized to diminish the coupling between the two microstrip feed lines for isolation improvement over the operating band. Two open‐end rectangular slots are attached in the ground plane of the MIMO antenna to generate anti‐phase current for further enhancing the isolation. By using this novel method, a compact ultrawideband MIMO slot antenna is designed and measured. It obtains an ultrawide bandwidth of 162.0%, ranging from 0.63 to 6 GHz, and excellent isolation of beyond 20 dB. Additionally, our MIMO antenna achieves a very low envelope correlation coefficient (ECC) of below 0.005, indicating its good diversity performance.

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Design of Compact Ultrawideband Slot Antenna With Improved Band-Edge Selectivity

Cited by 20 publications

References 14 publications

Compact slot antenna with enhanced band‐edge selectivity and switchable band‐notched functions for UWB applications

Compact slot antenna with enhanced band‐edge selectivity and switchable band‐notched functions for UWB applications

Design and analysis of clover leaf‐shaped fractal antenna integrated with stepped impedance resonator for wireless applications

Compact ultrawideband MIMO slot antenna with high isolation

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