Compact Design of Annular-Microstrip-Fed mmW Antenna Arrays

Abstract

In this paper, a series of four novel microstrip antenna array designs based on different annular-microstrip feeding lines at 60-GHz millimeter wave (mmW) band are proposed, aiming at the potential usage of the mmW coverage antenna with multi-directional property. As the feeding network, the annular contour microstrip lines are employed to connect the patch units so as to form a more compact array. Our first design is to use an outer contour annular microstrip line to connect four-direction linear arrays composed of 1 × 3 rectangular patches, thus the gain of 8.4 dBi and bandwidth of over 300 MHz are obtained. Our second design is to apply the two-direction pitchfork-shaped array each made up of two same linear arrays as the above, therefore the gain of 9.65 dBi and bandwidth of around 250 MHz are achieved. Our third design is to employ dual (inner and outer contour) annular-microstrip feeding lines to interconnect the above four-direction linear arrays, while our fourth design is to bring bridged annular-microstrip feeding lines, both of which can realize the goal of multi-directional radiation characteristic and higher gain of over 10 dBi.

Novel annular seven tooth antenna compare its gain and return loss with circular patch antenna for mobile navigation

“…Antenna was proposed to improve the excitation power for maximizing the drift current that generates the frequency range for the high-power transfer and long-distance applications with the bandwidth of 6.5 GHz [13]. Proposed the antenna with annular microstrip feeding lines for converting the multidirectional properties of the antenna into the single array with the improved gain of 6.4 dBi with 300 MHz frequency [14]. Developed the liquid dielectric resonator antenna with the improved annular design patch with the resonating frequency of 1.8 to 2.8 GHz with the good sensitivity for air pressure applications by making the essential changes in the air pressure sensor [15].…”

A Self-Adapting, Pixelized Planar Antenna Design for Infrared Frequencies

“…Generally, a microstrip antenna (MSA) in its simplest form consists of a radiating element of various shapes such as square, circular and triangular on one side of the substrate and ground plane on the other side [ 37 , 38 ]. Radiation of the MSA can occur from the fringing fields between the edges of the patch and the ground plane.…”

“…If its material has a positive temperature coefficient (PTC), its resistance increases with increasing temperature. On the other hand, a negative temperature coefficient (NTC) material operates in the opposite manner, like in the case of [ 37 , 38 ] (pp. 5818–5826) (pp.…”