Compact ultra‐wideband slot antenna with three notched‐band characteristics

Abstract

A very compact ultra‐wideband (UWB) slot antenna with three L‐shaped slots for notched‐band characteristics is presented in this article. The antenna is designed and fabricated using a new stepped slot with different size, integrated in the ground plane, and excited by a 50 Ω microstrip transmission line. The stepped slot is used to minimize the dimensions of the antenna and to achieve an impedance bandwidth between 2.65 and 11.05 GHz with voltage standing wave ratio (VSWR) less than 2. The length of the stepped slot is equal to a quarter wavelength to create a resonance in the desired frequency. Three L‐shaped slots with various sizes are etched in the ground plane to reject three frequency bands in C‐band (3.7‐4.2 GHz), WLAN (5.15‐5.825 GHz), and X‐band (7.25‐7.75 GHz), respectively. The notched‐band frequency can be controlled by changing the length of the L‐shaped slot. The proposed antenna has a very small size (20.25 × 8 × 1.27 mm3) compared with previous works. The measured and simulated results show a good agreement in terms of radiation pattern and impedance matching.

Compact stepped slot antenna for ultra-wideband applications

“…From this study, it can be clearly seen that the proposed design is simple and provides a good performance in terms of compactness compared with previous works. This work is mainly inspired from our previous work cited in [4]. The results obtained in terms of reflection coefficient and radiation pattern have a good agreement with the simulated ones.…”

“…The UWB technology was authorized by the federal communication commission to use a new spectrum from 3.1 to 10.6 GHz with effective isotropic radiated power <−41.3 dBm/MHz in commercial applications [3]. The UWB technology is characterized by several advantages, including a wide impedance bandwidth, very-low-power spectral density, considerable channel capacity, and excellent immunity to multi-channel interference [4][5][6].…”

Multiband Stepped Antenna for Wireless Communication Applications

“…Besides, analogous to the obtained results in [18][19], the cross-polarized patterns lar ring of about 15.71% and 22.22%. It is revealed that the obtained efficiency surpass the one attained by some recently published papers like in [21]. Additionally, in order to show the importance of the proposed antenna, a comparative review has been established in Table 2.…”

Design of a novel compact modified‐circular printed antenna for high data rate wireless sensor networks

“…13 Numerous shapes of patch antenna structures have been listed in the literature survey. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Mostly used designs of UWB antenna are square, circular, triangle, ring, stepped rectangular, elliptical, pentagon, and hexagonal shapes. From that, circular shapes are widely used for UWB systems and it is suitable for antenna miniaturization.…”

“…The proposed antenna provides better miniaturization when compared to tapered slot with tuning patch, 21 Combination of Sierpinski Carpet and GiusepePeano Fractals, 22 Parasitic rectangular slot, 23 A broken-heart-shaped patch and slotted partial ground plane, 24 Stepped patch with a ground truncation, 27 Complementary split ring resonator slot and two L-shaped stubs, 28 Half-cutting method, 29 Rectangular slit and an Lshaped stub 30 and slot antenna with three L-shaped slots. 31 In this letter, a novel compact UWB circular antenna for wireless sensor nodes application is proposed and presented. The miniaturization of this low-profile antenna achieved by combination of elliptical ring slot and two crescent-shaped slots in circular patch and two dumbbell-shaped slots in feedline with a partial ground.…”