A new defected ground structure (DGS) with tunable working frequency and reconfigurable bandwidth is proposed in this paper. The prototype combines the conventional DGS with T-shaped patch featuring narrow bandwidth and two such units located symmetrically featuring wide bandwidth. The proposed structure is designed, simulated and measured. By embedding two reversely-set PIN diodes and four var...

Abstract : Microstrip antennas or patch antennas are popular for their attractive features such as low profile, low weight, low cost, ease of fabrication and integration with RF devices. Micro strip antennas have been found favorable because they are inexpensive to manufacture and compatible with monolithic microwave integrated circuit designs (MMIC). They are usually employed at UHF and higher...

Glass formers are characterized by their ability to avoid crystallization. As monodisperse systems tend rapidly crystallize, the most common glass in simulations composed of mixtures particles with different sizes. Here, we make use patchy change local structure propose them as formers. We explore two patch geometries: a 12-patch geometry that enhances formation icosahedral clusters and an 8-pa...

The impedance bandwidth of a probe-fed microstrip antenna (MSA) is inherently narrow. Therefore, many approaches to increase the bandwidth such as using additional microstrip resonators [1], stacking parasitic patches above a fed patch (stacked MSA) [2] and embedding a U-shaped slot in the radiating patch [3], etc. have been proposed. It is desirable for wideband antennas that the frequency cha...

This paper is a response to ‘Why Be Rational?’ by Niko Kolodny. Kolodny argues that we have no reason to satisfy the requirements of rationality. His argument assumes that these requirements have a logically narrow scope. To see what the question of scope turns on, this comment provides a semantics for ‘requirement’. It shows that requirements of rationality have a wide scope, at least under on...

In this paper we show the triangular geometry of the microstrip patch is one of the mostcommon shapes having a wide range application ranging from circuit elements to modernwireless antenna. In this paper we compare Cslot microstrip antenna an slotted equilateraltriangular microstrip antenna. Recent survey of open literature shows interesting developmentof this patch as novel ci...