Abstract
Large constellations of low-orbit satellites have already been launched with the aim of offering complete worldwide coverage of broadband Internet; however, compact, simple, and low-cost mobile terminals are necessary to establish the communication. This paper describes the design of a reconfigurable and compact filtenna with the ability to switch between the satellites’ uplink and downlink frequencies, 20 GHz and 29 GHz, maintaining an excellent performance. Due to its simplicity, efficiency, and Rx/Tx isolation, this antenna is a relevant candidate to be part of mobile terminals and devices, or even sensors, that communicate with satellites.
Highlights
The development of communications systems has followed the technological advances and the pressure that societies exert on better services, amenities, and being online
A second rectangular metal structure was designed around the main patch having a feed line with an adequate width, weighing its dimensions, the feasibility, and the and, when both are connected via a PIN diode, the antenna resonates at 20 GHz
Regarding the bias circuit attached to the patch, it was confirmed by simulation that the best position was the center of the patch length, as it is the location where the patch has the lowest impedance, and the appropriate location to place in parallel an extremely high impedance, minimizing any impact
Summary
The development of communications systems has followed the technological advances and the pressure that societies exert on better services, amenities, and being online. Sensors 2020, 20, 2333 of the antennas edges, and if they are connected, it is possible to select the polarization of the antenna Another technique using RF-MEMS can be seen in [5], where an antenna that can change its radiation pattern is presented, operating at 6.85 GHz. Analyzing the reported works, it is possible to conclude that the presented antennas cannot be integrated into mobile terminals to communicate with satellites constellations. An ultra-wide bandwidth antenna that is capable of operating within the range of 3.1 to 10.6 GHz is reported in [9], using a band pass filter consisting of short-circuited shunt stubs and inter digital edge coupled microstrip lines, to improve the selectivity, since the frequencies out of this band can generate interference with others communication systems.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
