To improve the gain of the antenna, a simple FSS surface is designed to be placed under the antenna at a distance of 15 mm. Three frequency modes of operation have been obtained the 2.4 GHz frequency band with the right-hand arm is fully truncated, the 3.5 GHz frequency band with the two arms is completely maintained, and the 4 GHz frequency band with the right-hand arm is partially truncated. The length of the right-hand arm of the antenna is used to achieve frequency reconfiguration by using PIN diodes. This antenna is a coplanar waveguide (CPW)-fed monopole with two balanced arms printed on a thin ROGERS 3003 flexible substrate. The proposed antenna operates at three of the IoT frequency bands.

By making the domains smaller the peak memory can also be lowered.This paper proposes a flexible, frequency-reconfigurable monopole antenna design with frequency selective surface (FSS) for Internet of Things (IoT) applications. Good news – with DDM solver the peak memory relates to the number and size of domains per core. If your structure contains geometrically identical elements – like antenna arrays – DDM solver allows setting up of repetitions. Direct Frequency Solver requires a big amount of RAM for managing big simulations, and sometimes you just do not have enough to work with.īy dividing the structure into smaller domains DDM solver gives a good simulation speedup, as domains can be solved in parallel, depending on the number of cores. On the contrary, simulation time with Frequency Domain Solver is independent of the number of ports in the structure. When the count goes on hundreds, it can result in days of simulation. It means that the more ports you have, the longer simulation time you get. Time Domain Solver calculates each port sequentially.

Most mm-wave applications require dual-polarization, which multiplies the number of ports by 2, resulting in 32. It is a 4×4 array, that gives us 16 elements in total, or 16 ports. Let’s look at a simple cavity mm-wave antenna array, that works in the 24-32GHz range.

GSM, 3G, 4G LTE, 5G Sub-6 antenna design.

Cst antenna simulation