two-arm spiral antenna
Design of Miniaturized Quad-Band Dual-Arm Spiral Patch Antenna for RFID, WLAN and WiMAX Applications
... the antenna miniaturization to a certain ...and two U- and F-shaped branches were used as additional ...planar spiral-shaped folded strip MA was proposed for resonating at different frequency bands ...
17
A New Spiral Antenna with Improved Axial Ratio and Shorted Arm Length
... new antenna is measured by Advantest R3770 network ...new spiral antenna, and good reflection coefficient is achieved throughout the desired ...fabricated antenna caused by fabrication and ...
7
Analysis of the Active Region of Archimedean Spiral Antenna
... Archimedean Spiral Antenna (ASA), demonstrating the concept of frequency dependent active region and this determines the effective radiation area on the spiral ...the spiral antenna. In ...
6
Archimedean Spiral Antenna with Band-Notched Characteristics
... (CPW)-fed two- arm Archimedean spiral slot band notch antenna using the slotted technique is ...proposed antenna is designed to introduce a band notch by integrating three inverted ...
12
A Spiral Slot Antenna with Reconfigurable CPW-to-Slotline Transition for Polarization Diversity
... the two spiral ...The spiral arm is tapered by gradually increasing the slots width for a better performance [11], as shown in Equation (2), where turnrate represents the increasing width per ...
13
A Spiral Antenna with Integrated Parallel-Plane Feeding Structure
... designed antenna with integrated parallel-plane feeding ...the spiral arms and feeding structure. So in this paper the two arms of the spiral antenna are printed on different sides of ...
6
Design of Dual Band Notch UWB Monopole Antenna Using Dual-Arm Spiral Resonator
... The proposed structure gives a better performance than the structure reported with four EBG cells [12]. The DASR are optimized using transmission line model (Figure 1(a)), and its return loss characteristic is shown in ...
7
Archimedean spiral antenna on moveable ground plane for UWB applications
... a two-arm Archimedean spiral antenna over a moveable conducting ground plane (GP) for UWB ...the antenna in terms of return loss, gain, axial ratio and radiation pattern are analyzed ...
7
Tappered Spiral Helix Antenna
... the spiral antennas in 1954.The spiral antenna is class of frequency independent antenna under angular ...The spiral is a planar structure that is fabricated by photo etching a ...
8
Comparative Study of Different Type of Spiral Antennas
... Archimedean spiral antenna isolated in free space radiates a circularly polarized wave in two directions normal to the antenna ...Archimedean spiral antenna with a conducting ...
5
Low Profile Omni directional Circularly Polarized Patch Antenna for WLAN Applications
... this antenna is circular polarization fields produce due to curved branches without effect on the input impedance, because curved branches not introduced on radiating ...an antenna is as simple as that of ...
7
Bandwidth enhancement of spiral antenna with defected ground structure
... verify the experience that larger antennas are generally more efficient, especially for wide band operation. By expressing the formulas in fundamental forms; the inherent similarity of the electric and magnetic radiators ...
42
Mutual Coupling Reduction Techniques in Microstrip Patch Antennas: A Survey
... for two and four elements microstrip antenna array were ...the antenna is inserted between the patches creating a band gap in the operation frequency band of the ...DGS antenna was analyzed ...
6
Design of Planar Archimedean Spiral Antenna for Wi-Max Using Different Materials
... necessary. Antenna is the structure associated with the region of transition between a guided wave and a “free space” wave, or vice versa [1] ...The spiral antenna is a wideband antenna with ...
5
CPW-Fed Dual-Band Dual-Sense Circularly Polarized Antenna for WiMAX Application
... slot antenna (CPSSA). The antenna consists of a rectangular radiator with two unequal rectangular strips, connected by a CPW feed ...proposed antenna obtained two CP bandwidths of ...
8
Vol 1, No 4 (2013)
... tapered spiral helix antenna covering the frequency range 1- ...Tappered spiral helix antenna is a compact state-of- the-art circularly polarized antenna, which works over multi-octave ...
6
A Novel Design of Compact Dipole Antenna for 900 MHz and 2.4 GHz RFID Tag Applications
... Different kinds of fractal antennas have been studied in several research articles, such as Sierpinski monopole [3] Koch curves monopole [4] and tree monopole [5], they verified that fractal antennas has size-reducing ...
6
Design and Analysis of Archimedean Spiral Reconfigurable Antenna
... Reconfigurable antenna means a antenna which supports different operating frequencies range bands ...reconfigurable antenna, we may easily change to different operating frequency ...receiver ...
6
Pattern Optimization in an UWB Spiral Array Antenna
... To modify the array radiation pattern, we studied three different approaches, including tapering the antenna elements, using Genetic Algorithm (GA) and using metamaterial cover as a reflector. First, the effects ...
15
Galaxy Zoo: star formation versus spiral arm number
... However, spiral structure can take many forms: from galaxies displaying two strong ‘grand design’ arms to those with many ‘flocculent’ ...different arm types are related to a galaxy’s star formation ...
14