Design, Investigation and Measurement of A Compact Ultra Wideband Antenna for Portable Applications

Mobashsher, Ahmed Toaha; Islam, Mohammad Tariqul

doi:10.2478/msr-2013-0031

Cited by 8 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the frequency increases the current concentration in horizontal directions of the antenna gradually decreases. This low concentration of current develops a high cross-polarized component especially in the H-plane pattern which has been reported in [26]. Furthermore, the concentration of current in the modified bow-tie-shaped radiator and the CPW-feedline are increasing with the frequency which plays a vital role in the flow of vertical (Y-direction) current.…”

Section: B Surface Current Distributionssupporting

confidence: 54%

“…The total length of the vertical radiator is l 2 +l 3 and its lower end is connected to the CPW feed line of length l 1 . Instead of using the complex matching network to attain a very wide operating band, the presented asymmetric antenna is fed by an SMA connector which acts as a selfresonator with a very compact dimension [26].…”

Section: Antenna Designmentioning

confidence: 99%

“…The contribution to the antenna radiation is mainly from vertical components (in Y-direction) of the surface currents. Instead of contributing to the co-polarized radiation in the H-plane pattern, the currents along the horizontal arms of the Lshaped and inverted U-shaped ground planes enhance the cross-polarized component [26]. However, at higher frequencies, the cross-polarization component decreases as the currents in horizontal arms of the coplanar ground planes decreases and the size of the antenna becomes larger in comparison to the wavelength.…”

Section: A Frequency-domain Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

CPW-Fed Super-Wideband Antenna With Modified Vertical Bow-Tie-Shaped Patch for Wireless Sensor Networks

et al. 2021

Self Cite

View full text Add to dashboard Cite

Section: B Surface Current Distributionssupporting

confidence: 54%

Section: Antenna Designmentioning

confidence: 99%

Section: A Frequency-domain Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

CPW-Fed Super-Wideband Antenna With Modified Vertical Bow-Tie-Shaped Patch for Wireless Sensor Networks

et al. 2021

Self Cite

View full text Add to dashboard Cite

“…Several microstrip line and CPW-fed antennas have already been reported for wideband/multi-band applications. To achieve multi-band operation, they either use slot/s in the patch/ground plane or parasitic slit 7 – 27 . Unlike microstrip line-fed antennas, CPW-fed antennas occupy nearly all areas surrounding the patch.…”

Section: Introductionmentioning

confidence: 99%

A dual-band CPW-fed miniature planar antenna for S-, C-, WiMAX, WLAN, UWB, and X-band applications

Alam

Azim

Sobahi

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

A miniature planar antenna is a vital component of any portable wireless communication device. The antenna in portable devices should provide wide/multiple operating bands to cover a good number of narrowband services as a multi-band antenna not only reduces the number of antennas but also lessens the system complexity, cost, and device size. To operate over S-, C-, WiMAX, WLAN, UWB, and X-communication bands, in this paper, a dual-band CPW-fed antenna is presented. The anticipated antenna is made up of a vertical bow-tie-shaped patch and two asymmetric ground planes and etched on the same side of the single-sided standard substrate material. To generate two distinct operating bands, an inverted L-shaped parasitic element is inserted within the modified U-shaped coplanar ground plane. The antenna achieved dual operating bands of 3.24–8.29 GHz and 9.12–11.25 GHz in measurement which helps the proposed antenna to cover S-, C-, WiMAX, WLAN, 4G LTE, 5G sub-6 GHz, UWB, and X-communication bands. In the two operating bands, the antenna realized a peak gain of 4.33 dBi, and 4.80 dBi, the maximum radiation efficiency of 86.6%, and 72.6%, and exhibits symmetric radiation patterns. In the operating bands, the antenna also exhibits good time-domain behavior which helps it to transmit the signal with minimum distortion.

show abstract

“…UWB monopole antennas are primarily designed by meeting the electrical symmetry of dipole antennas. Afterward, some miniaturization measures, such as imposing slots [67,68], truncations [69], fractals [70], ground modifications [71,72], dielectric resonators [73], impedance transformers [74], or capacitively loaded loop (CLL) resonators [75], are applied to realize smaller quasimonopole UWB structures.…”

Section: Systems and Literature Reviewmentioning

confidence: 99%

Wideband microwave imaging system for brain injury diagnosis

Mobashsher¹

View full text Add to dashboard Cite

Brain injury is a major cause of disability and mortality worldwide. This medical emergency occurs when the brain is damaged as a result of various traumatic and non-traumatic incidences including accidents, strokes, drug abuses, tumours, infections and various diseases. As the devastating disorder of brain injury deteriorates rapidly, fast diagnosis and management is critically important for the treatment and recovery of the affected patient. Therefore, on-the-spot accurate detection by means of head imaging is the governing factor of the timely medication to ensure complete recovery of the injured patient. Although some existing imaging technologies, like CT and MRI, are capable for brain injury diagnosis, they are time-consuming, expensive, bulky and mostly stationary. Thus they cannot be carried by first response paramedic teams for the diagnosis purpose or be used for monitoring the patient to observe concurrent brain injury over periods of time without moving the patient. A compact and mobile technology that can be applied to monitor the patient continuously in real time, either at the bedside or in emergency room, would be a significant advantage comparing to the existing imaging techniques. This thesis aims to develop wideband microwave imaging systems for brain injury diagnosis and in doing so makes seven main contributions to the field of microwave imaging systems.As the efficacy of the microwave imaging systems relies on the sensing antennas, emphasize is given in the developments of compact, wideband antennas with directional radiation patterns for low microwave frequencies, which is the first contribution of this thesis. Three-dimensional (3D) antennas are proposed relying on multiple folding and slot-loading techniques. Nevertheless, a novel generalized miniaturization technique is proposed for compact antennas. The antennas are found to be efficient in both near-and far-fields for both frequency-and time-domain characterizations.The second contribution is the development of artificial human head phantom with realistic heterogeneous tissue distributions and actual wideband frequency-dispersive dielectric properties.The phantom is fabricated from artificial tissue emulating materials which are contained and structured by using 3D printed structures and castes. This realistic 3D human head phantom significantly improves the reliability of the experimental validation process of wideband microwave imaging compared to the reported validations with existing simple and stylized head phantoms.The contribution third contribution is the performance comparison of directional and omni-directional antennas for wideband microwave head imaging systems. A novel near-field time-domain characterization technique is proposed that enables the comparative analysis of antennas for nearfield applications. Application of this technique demonstrates that for microwave imaging systems directional antennas are more effective than omni-directional antennas. In terms of imaging performance, it is observed that directio...

show abstract

Design, Investigation and Measurement of A Compact Ultra Wideband Antenna for Portable Applications

Cited by 8 publications

References 33 publications

CPW-Fed Super-Wideband Antenna With Modified Vertical Bow-Tie-Shaped Patch for Wireless Sensor Networks

CPW-Fed Super-Wideband Antenna With Modified Vertical Bow-Tie-Shaped Patch for Wireless Sensor Networks

A dual-band CPW-fed miniature planar antenna for S-, C-, WiMAX, WLAN, UWB, and X-band applications

Wideband microwave imaging system for brain injury diagnosis

Contact Info

Product

Resources

About