TWO-DIMENSIONAL ANTENNA ARRAY, ONE-DIMENSIONAL ANTENNA ARRAY AND SINGLE DIFFERENTIAL FEEDING ANTENNA

摘要

A two-dimensional antenna array has n rows of 1×m one-dimensional array and each one-dimensional array is composed of multiple single differential feeding antennas. Each single differential feeding antenna has a differential feeding structure and a microstrip antenna stripe. A length of the microstrip antenna stripe is no longer than a dielectric wavelength so the microstrip antenna stripe is not excited to a high-order mode. An angle of inclination of a main beam aligns with the broadside and a width of the main beam is further concentrated at elevation direction. The differential feeding structure can reduce an even mode to enhance an isolation. The one and two-dimensional antenna array is miniature by using the small single differential feeding antennas. In addition, the isolation and gain of a dual-antenna system using the two-dimensional antenna arrays or the one-dimensional antenna arrays are further enhanced and increased if more feeding antenna arrays are used.

主权项

1. An two-dimensional antenna array, comprising:
a dielectric substrate having a first plane and a second plane; multiple antenna units formed on the first plane and arranged to n rows and m columns; n power dividing circuits formed on the first plane, arranged to adjacent the n rows of the antenna units, and respectively connected to the adjacent row of the antenna units; a main feeding point connected to the n power dividing circuits; and a grounding layer formed on the second plane; wherein each of the antenna unit comprises:
multiple parallel non-high-order-mode differential feeding antennas, each of which has:
a differential feeding structure having two ports, wherein one port is a feeding point and the other port is connected to a differential circuit having an inverting input and a non-inverting input; anda microstrip antenna stripe having:
two feeding terminals respectively connected to the inverting input and the non-inverting input of the differential circuit; anda length which is no longer than a dielectric wavelength; anda power divider connected among the non-high-order-mode differential feeding antennas and the corresponding power dividing circuit.