Antenna representation in two-port network scattering parameter

A Two-port Antenna for Wireless-powered Uwb-rfid Tags

This paper presents a two-port antenna including a receiving port and a transmitting one in the same volume. These two antennas are physically integrated and electrically isolated. The receiving antenna is a linearly polarized narrowband slot for energy harvesting, whereas the transmitting one is a circularlypolarized ultrawideband (UWB) quasi-spiral for signal radiation. The measurement result...

Distributed-Parameter Port-Hamiltonian Systems

Two-port Network Transfer Function for Power Line Topology Modeling

This paper deals with modeling of power line communication. A two-port network model is theoretically described and compared with measurement. A substantial part is focused on the mathematical description of distribution network using the method, which uses chain parameter matrices describing the relation between input and output voltage and current of the two-port network. This method is used ...

Needle Port Assisted Two-Port Laparoscopic Appendicectomy

Introduction: In conventional Laparoscopic Appendicectomy, three ports are used wherein both the subumbilical and supra-pubic port sites are hidden the by the natural camouflages and the only visible scar is the third port in the iliac fossa. The third port scar can be made invisible by using a needle port for trans-parietal appendicular traction. Materials and Methods: From January 2013 to May...

Two Sewing Needles in the Brain: A Case Re-port

Brain foreign bodies and penetrating missile injuries of the brain are familiar topics for Iranian physicians, especially after Iran and Iraq war. But it’s not easily plausible that there is a couple of sewing needles in the cranium of a patient who has not any history of head trauma or penetrating injury. The patient was a 42-year-old man who admitted in neurology ward of Mottahari Hospital in...