Proceedings ArticleDOI
Ferromagnetic composite-based and magnetically-tunable microwave devices
Erwan Salahun,Gérard Tanné,P. Queffelec,P. Gelin,A.-L. Adenot,Olivier Acher +5 more
- Vol. 2, pp 1185-1188
Reads0
Chats0
TLDR
In this paper, a new generation of tunable microwave devices using ferromagnetic materials was investigated, and the sensitivity of the device cut-off frequency to the dc magnetic field was investigated for two filtering resonators (stub resonator and Stepped Impedance Resonator).Abstract:
This article deals with a new generation of tunable microwave devices using ferromagnetic materials. The sensitivity of the device cut-off frequency to the dc magnetic field was investigated for two filtering resonators (stub resonator and Stepped Impedance Resonator). The stub resonator exhibited a frequency tunability of nearly 40% for a dc magnetic field strength of 250 Oe, whereas the linewidth remained unchanged. A 12.2% tunability of the SIR device was reached under 250 Oe applied.read more
Citations
More filters
Patent
Multi-band horn antenna using frequency selective surfaces
TL;DR: In this article, a waveguide is coupled to a second propagation medium such that the RF signal has a second wavelength which is at least twice as long as a physical distance between centers of adjacent FSS elements.
Patent
Embedded toroidal transformers in ceramic substrates
TL;DR: In this paper, the authors proposed a method for forming at least one conductive coil (119a, 119b) comprising a plurality of turns about an unfired ceramic toroidal core region (120a, 120b) defined within an uncorrelated substrate.
Patent
Embedded toroidal inductors
TL;DR: In this paper, a method for making an embedded toroidal inductor (118) includes forming in a ceramic substrate (100) a first plurality of conductive vias (102) radially spaced a first distance from a central axis (101) so as to define an inner circumference.
Patent
Antenna with dynamically variable operating band
TL;DR: In this article, a composition processor is provided for selectively varying a composition of the fluid dielectric (106) so as to dynamically change an electrical characteristic of the antenna radiating element (108) in response to a control signal.
Patent
High efficiency crossed slot microstrip antenna
TL;DR: In this article, a crossed slot fed microstrip antenna (100) includes a conducting ground plane (125) which has at least one crossed slot (125), and at least two feed lines (105).
References
More filters
Journal ArticleDOI
Correlation between magnetic properties of layered ferromagnetic/dielectric material and tunable microwave device applications
TL;DR: In this paper, the authors integrated a layered ferromagnetic composite in a microwave propagation structure, which is the main advantage of such a material is the large impedance for one polarization.
Proceedings ArticleDOI
Miniature microstrip stepped impedance resonator bandpass filters and diplexers for mobile communications
TL;DR: In this article, a very high dielectric constant substrate (spl epsiv/sub r/=89 and h=2 mm) was used for a small-strip stepped impedance resonator bandpass filter for satellite mobile communications.
Journal ArticleDOI
Wideband electronically tunable microwave bandstop filters using iron film-gallium arsenide waveguide structure
Chen S. Tsai,Jun Su,Chin C. Lee +2 more
TL;DR: In this paper, a wideband electronically tunable microwave bandstop filter using ultrathin iron film-gallium arsenide (FeGaAs) material structure has been realized.
Journal ArticleDOI
A broadband permeameter for "in situ" measurements of rectangular samples
TL;DR: In this article, the authors proposed a measurement method based on S-parameters measurements of an asymmetrical stripline containing the sample under test, which can reproduce the same environment for the material under test as encountered in microwave devices.
Journal ArticleDOI
Demonstration of anisotropic composites with tuneable microwave permeability manufactured from ferromagnetic thin films
TL;DR: In this paper, the authors investigated the microwave properties of laminated insulator ferromagnetic on the edge (LIFE) composites in the 0.1 to 18 GHz range when a static magnetic field is applied along the propagation direction.