A
Ari Raappana
Publications - 7
Citations - 190
Ari Raappana is an academic researcher. The author has contributed to research in topics: Dipole antenna & Monopole antenna. The author has an hindex of 6, co-authored 7 publications receiving 190 citations.
Papers
More filters
Patent
Internal monopole antenna
Ari Raappana,Marko Kupari,Anne Isohaetaelae,Petteri Annamaa,Jyrki Mikkola,Pasi Keskitalo,Sami Kylloenen +6 more
TL;DR: In this paper, an internal monopole antenna of a flat a radio device has an arrangement for improving its characteristics, which consists of a planar monopole radiator (310) and an auxiliary element (320), which is located at the point of the planar element as viewed in the direction of its normal.
Patent
Internal antenna and methods
TL;DR: In this article, a planar radiator with a branch for forming a lower operating band for the antenna and a second branch (222) for forming an upper operating band is presented.
Patent
Distributed multiband antenna and methods
TL;DR: In this paper, a planar inverted-F antenna (PIFA) configured to operate in a high-frequency band, and a matched monopole configured to operation in a low frequency band are used within a handheld mobile device (e.g., cellular telephone).
Patent
Multi-feed antenna apparatus and methods
TL;DR: In this paper, the authors proposed a space efficient multi-feed antenna apparatus, and methods for use in a radio frequency communications device, consisting of three (3) separate radiator structures disposed on a common antenna carrier.
Patent
Switchable diversity antenna apparatus and methods
TL;DR: In this article, an active diversity antenna is used within a handheld mobile device (e.g., cellular telephone or smartphone), and enables device operation in several low frequency bands (LBs).