W. Swelam

Design of miniaturized fractal quasi-self complimentary antenna for UWB applications

A novel microstrip-fed quasi self-complementary fractal antenna is designed and fabricated to achieve the desired Ultra Wideband (UWB) features. The prospective antenna has a total size of 15 × 13 × 1.5 mm3 that empowers planting in different portable devices. A wide impedance bandwidth is achieved covering the band from 3.6 GHz to more than 14 GHz with reflection coefficient superior to - 10dB. Omnidirectional radiation pattern with stable radiation characteristics is acquired. Good agreement is achieved between simulated and measurement results as a proof of concept.

Novel on-board triplexer antenna for satellite applications

In this paper, an efficient highly isolated triplexer antenna to enable multiband operating frequencies is approached with neither adding filtering components nor terminating any of the three ports. The proposed approach is a highly isolated triplexer single antenna implemented on a single substrate two-layer printed circuit board. The triplexer antenna is designed, manufactured and measured with a three different resonance frequencies separated to cover multiple separated satellite communication applications. The propounded design comprises of a rectangular three-port antenna mounted on Rogers RO4350B two-layer single substrate fed by microstrip transmission line and coplanar wave-guide (CPW). The overall antennas dimensions are 80.5 × 77 mm2. The presented antenna design has been simulated and optimized using finite integration technique (FIT) with the commercial CST studio. The obtained results are showing port isolation better than −20dB in average with good impedance matching between − 18 and −36dB at each port of the operating frequencies. The achieved directivity is 3.3, 4.5 and 6.2 dBi at 1.5, 3.6, and 2.5 GHz with 97%, 66% and 90% high efficiency respectively.

16×8 wideband microstrip planar array antenna for E-band millimeter-wave 5G high speed WLAN and broadband internet applications

In this paper the design, and simulation of a 16×8 wideband microstrip planar array antenna which covers E- band frequency from 81 GHz up to 86 GHz with 5GHz bandwidth has been investigated and more than 14 dBi gain has been achieved. The designed array etched on Rogers RO-3003 substrate which enables it to be used in high speed point to point wireless local area networks and broadband internet access applications.

Pharaonic ankh-key millimeter wave broadband antenna design and fabrication for 5G applications

A new design of millimeter-wave antenna is proposed to work on the 60.5–72 GHz frequency band with more than 11 GHz bandwidth. A low cost, single layer and easily fabricated design is achieved with a peak gain of 8.4 dBi. The simulated and measured results showed satisfying parameters enhancing this design to be used at millimetre wave frequencies for short-range wireless communication applications, such as 5G applications and V-band applications.

A compact highly isolated two ports microstrip antenna based on Defected Ground Structure for WLAN/WiMAX applications

Strong mutual coupling between closely spaced ports in compact antenna has been caused significant system performance degradation, such as reduction in gain and signal-to-noise ratio. In this paper, an efficient technique utilizing the Defected Ground Structure (DGS) has been employed to propose two-port Elliptical patch structure. The proposed DGS has been used to control and separate the resonant frequency of each port and reduce the coupling effect. The presented two-port antenna structure has been analyzed, investigated and optimized using Finite Integral Technique (FIT) numerical method. The designed antenna has a small overall size of 30 × 30mm2, and operates over the frequency ranges, 5.7-5.97 GHz, and 5.35-5.6 GHz suitable for WLAN and WiMAX applications. The first port operates at 5.8 GHz with efficiency 62% while second port operates at 5.43 GHz with efficiency 66%. Thus, the proposed DGS is simply representing built-in resonance and decoupling circuits with no additional cost. In addition, maximum VSWR value <; 1.5 have been achieved through the operating frequency range. The presented DGS pattern has been proved to be an excellent feature for designing and optimizing any two-port antenna configuration. Moreover, the proposed two-port microstrip antenna with separated resonance frequencies can be used as multifunction antenna in several communication applications. Good agreement has been obtained between simulated and measured parameters.

Radial Line Slotted Antenna for satellite communications in Ku-band

Radial Line Slot Antennas (RLSAs) are well known as a high gain, high efficiency planar slotted array antennas. Due to its high gain characteristic, low losses, high efficiency and compact structure, RLSA has been proposed for satellite communications to substitute the conventional parabolic antennas. Several structures where studied previously, mainly operating in C-band with a huge number of slots arranged spirally. In this paper, a simple structure with reduced number of slots where designed, analyzed and fabricated to operate in Ku-band for satellite applications. Also a parametric study will be performed to deeply understand the effect of changing structural parameters on the resultant antenna gain and the operating frequency.

A novel triplexer antenna with high isolation for frequency diversity used in 3G/4G applications

In this paper, a novel triplexer antenna is employed to realize frequency diversity for highly isolated three-port. The proposed triplexer is designed with separated resonance frequencies to be used as multifunction antenna in several communication applications. The presented three-port antenna structure is analyzed using Finite Integration Technique (FIT) numerical method. The ports isolation is better than -20 dB. In addition, the triplexer antenna is achieved good impedance matching at each port through the operating frequency range without the need to extra matching circuits and thereby economizes the circuit size. The obtained gain at 3.58, 1.63, and 2.5 GHz is 5, 3.8 and 4 dB with high efficiency of 96%, 94% and 97% respectively. Furthermore, the proposed antenna has the advantages of simple design, reasonable compact size, wide bandwidth, good ports isolation and high efficiency.