- #Microstrip antenna theory and appliction s. s. zhang Patch#
- #Microstrip antenna theory and appliction s. s. zhang full#
- #Microstrip antenna theory and appliction s. s. zhang software#
The optimum Qf (82,320 GHz) is 1.53 times higher than that obtained via conventional sintering (53,654 GHz), with a dielectric permittivity, er = 7.3, and a temperature coefficient of resonant frequency, τf = –107.9 ppm/☌. The scanning electron microscope images demonstrate closely packed microstructures, and the chemical compatibility between BaF2 ceramics and Ag electrodes is identified. In this work, dense BaF2 ceramics with 95.3~98.5% relative densities have been prepared via the cold sintering (150–600 MPa, 150 ☌, 1 h) and following post-annealing at 900 ☌. Lower ԑr value and higher Q×f value make Li2Mg3Ti0♹2(Zn1/3Nb2/3)0.08O6 ceramic become an ideal material for preparing microstrip antennas.Ībstract: BaF2 is a low-firing fluoride with excellent microwave dielectric properties, while the densification of BaF2 ceramics is challenging via conventional sintering. The ԑr value of the system was decreased by 12.63%, and the Q×f value was increased by 11.13%, compared with pure LMT. Compared with pure LMT, all samples exhibited lower dielectric constant and higher Q×f value at the same time.
The phase composition, Raman spectra, micro-structure, bond valence, bond energy and microwave dielectric properties of Li2Mg3Ti1-x (Zn1/3Nb2/3)xO6 (0.02 ≤ x ≤ 0.08) ceramics were investigated subsequently.
Here, excellent performance microwave dielectric ceramics with low permittivity and high Q×f value were made by replacing Ti4+ of Li2Mg3TiO6 (LMT) system with (Zn1/3Nb2/3)4+. Therefore, As the key material for microstrip antenna substrate, the performance of microwave dielectric ceramic plays a decisive role.
#Microstrip antenna theory and appliction s. s. zhang full#
In order to meet the requirements of wireless communication for transmission rate, the research on millimeter wave microstrip antenna with wider frequency band and more stable gain is in full swing. The results of the proposed antenna are obtained in terms of Return Loss, Voltage Standing Wave Ratio, Gain and Radiation Pattern which have acceptable values of return loss less than -10 dB, VSWR less than 2 at each resonant frequencies and Gain more than 3 dB.Abstract: With the development of 5G technology, millimeter wave communication has gradually attracted the attention of scholars.
#Microstrip antenna theory and appliction s. s. zhang software#
Ansoft HFSS V13 (High Frequency Structure Simulator) software is used for the design and simulation of the proposed antenna. Coaxial probe feed is used to feed the proposed antenna because this type of feed provides better impedance matching to source by varying the feed position. Transmission line model is applied to calculate the dimensions of the proposed antenna.
The Rogers RT/Duroid 5880 with relative permittivity 2.2 and height 1.6 mm is used as substrate material for design of proposed antenna. Design frequency for the proposed antenna is 2.4 GHz which supports multiband behavior. The proposed antenna operates at 2.44 GHz, 5.53 GHz, 7.79 GHz and 9.39 GHz with up to 37% size reduction compared to the basic MPA.
#Microstrip antenna theory and appliction s. s. zhang Patch#
This paper presents miniaturization by introducing staircase shape at each edge of the patch of Microstrip Patch Antenna (MPA) which operates in S-band (2-4 GHz), C-band (4-8 GHz) and X-band (8-12 GHz).