Abstract: A planar monopole antenna consisting of a printed metal strip of rectangular spiral shape is studied. The spiral generates two resonance modes and radiates at two frequency bands. An example ...

During the peer-review process the editor and reviewers write an eLife assessment that summarises the significance of the findings reported in the article (on a scale ranging from landmark to useful) ...

Abstract: The paper proposes a miniaturized Ultra-wide band Circularly Polarized Spiral Antenna for L/S/C/X/Ku-Band Interferometer based Direction Finding application. The spiral antenna utilizes a ...

Emergence of unidirectionally propagating waves on bacterial biofilms. (a-b) Optical imaging shows spiral, planar (a), and radially shrinking waves (b) propagating unidirectionally on biofilm surfaces ...