Binary frequency reconfigurable microstrip antenna

Abstract

The invention discloses a binary frequency reconfigurable microstrip antenna, and belongs to the technical field of basic electrical elements. The frequency reconfigurable antenna is composed of an intermediate layer dielectric substrate, an upper layer microstrip structure arranged on the intermediate layer dielectric substrate and a bottom layer metal floor with a rectangular defected ground structure, the upper-layer microstrip structure comprises a short microstrip feeder line, a long main microstrip line and microstrip annular structures with different sizes, wherein the microstrip annular structures surround the two sides of the main microstrip line. A gap is reserved between the main microstrip line and each of the annular structures on the two sides to place three PIN diodes, and the effective electrical length of the antenna is changed through on-off of the diodes to achieve the three-bit binary frequency reconfigurable characteristic. The design is simple in structure and small in size, is realized in the form of a microstrip circuit, only uses three PIN diode switches to realize eight different working states, can meet the frequency requirements under different communication systems, has a directional diagram in a low-frequency working state similar to the directional diagram of a half-wave oscillator, and realizes omnidirectional radiation on an H surface.

Description

technical field [0001] The invention discloses a binary frequency reconfigurable microstrip antenna, which has eight different working states and covers a wider bandwidth, relates to reconfigurable antenna technology in wireless communication, and belongs to basic electrical components technical field. Background technique [0002] The quality requirements of the current wireless communication are constantly improving, and the antenna is an indispensable part of the wireless communication system. The improvement of the performance of the antenna can greatly affect the communication quality of the entire wireless communication system. Traditional antennas are generally designed for a single function. Nowadays, more and more multi-functional antennas can meet the frequency requirements of different mobile communication systems. Reconfigurable antennas have become a better solution to a series of problems caused by diversified frequency requirements and tight spectrum resource...

AI Technical Summary

Problems solved by technology

For example, Huda A.Majid et al. published an article "A Compact Frequency-Reconfigurable Narrowband Microstrip SlotAntenna" in 2012, which is also based on the microstrip monopole antenna, and the frequency can be realized by changing the effective electrical length of the floor slot. Reconfiguration, but each of its working bandwidths is narrow, and using up to 5 PIN diode switches, only 6 different working states are realized

Images