研究目的
To design a planar ultrathin electronically steerable parasitic array radiator (ESPAR) with compact size, electronically beam-switching ability, low power, and low cost characteristics for applications in wireless communications.
研究成果
The proposed planar ultrathin small 'CD-ESPAR' uses orthogonally crossed dipoles in phase quadrature to create endfire switched beams, making designing completely planar ESPARs with very low profile feasible. The antenna produces four switchable radiation patterns with more than 20 dB FBR and has more compact size and much lower antenna height while maintaining electronically beam-switching capability, making it suitable for applications in wireless communications.
研究不足
The asymmetric structure of the proposed antenna results in differences in performance when different diodes are turned ON. The actual overall size and height of the antenna may be larger than what is given in the table when considering the ground planes used in conventional ESPARs.
1：Experimental Design and Method Selection:
Theoretical analysis of the electric fields of orthogonally crossed dipoles in phase quadrature was conducted to design a planar crossed dipole ESPAR. A simple but effective impedance matching method was also proposed and analyzed.
2：Sample Selection and Data Sources:
A prototype resonating at 2.3 GHz was designed, fabricated, and measured.
3：3 GHz was designed, fabricated, and measured.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Rogers RO4003C substrate, SMP1345-079LF PIN diodes, 33 nH inductors, 47 Ω lumped resistor, 1.5 V button cell battery.
4：5 V button cell battery.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The antenna was etched on both sides of the substrate, with fan-shaped arms connected by a 3/4 ring-shaped phase delay line. Four diodes were controlled by four button batteries positioned at the four corners of the substrate.
5：Data Analysis Methods:
The performance of the proposed antenna was verified through simulation and measurement of reflection coefficient and radiation patterns.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
