Compact Ultra-Wideband Series-Feed Microstrip Antenna Arrays for IoT Communications

Abstract

Modern communication systems require high bandwidth to meet the needs of the huge number of sensors and the growing amount of data consumed, and an exponential growth is expected in the future with the integration of internet of things networks. Spectrum regions in the millimeter waves have aroused new interests, mainly because of the contiguous bands available to meet these needs. In return, and to combat the high losses of propagation in these frequencies, higher gain antennas are needed. This paper describes the use of a logarithmic architecture in the design of microstrip antenna arrays, creating structures with high gain and ultra-wide bandwidth. Three different solutions are presented with five, seven, and nine elements, reaching about 25%, 30%, and 44% of bandwidth, achieving ultra-wideband behavior, efficient and with a compact structure operating at frequencies in around 28 GHz.

A Compact Planar Ultra-Wideband Array Antenna

“…Series feed structures [9], parallel feed structures [10][11][12][13][14][15][16][17][18][19], fractional and Fibonacci arrays [20,21], and MIMO arrays [22][23][24] are the most common array architectures used in the current research for planar UWB arrays. Te series feed itself possesses limited bandwidth characteristics.…”

“…To assure the array's bandwidth when using it in the ultra-wideband feld, we must extend the feed point into the patch and modify the distance between the feeder and the patch. Tree series logperiodic antenna was created in this paper [9]. Te 1 × 9 array among them achieves a total bandwidth of 12.2 GHz between 12.2 GHz and 21.71 GHz, with a bandwidth increase of up to 12.0 dBi.…”

Dual-Band UWB Monopole Antenna for IoT Applications

“…Since the Federal Communication Commission (FCC) approved the 3.1-10.6 GHz range of frequency band for commercial UWB applications, the FCC defines the UWB phenomenon as a radio system with a bandwidth >=500 MHz that spans more than 25% of the center frequency [1]. The evolution of the techniques that adapt to ultrawideband has been increasing ever since the use of UWB spectrum was made permissible by the FCC.…”