A small adaptive array antenna for mobile communications

Milne, Robert

doi:10.1109/aps.1985.1149485

Cited by 17 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the use of switched parasites for controlling patterns goes back to the work of Yagi and Uda during the 1930's and has been patented in various forms for various applications, for example, by Gueguen [8] and many others too numerous to mention. In mobile communications, Milne [e.g.,9] has used this concept for multiple switched elements for a vehicular satellite (point-topoint) communications antenna, and Hamer and Butcher [10] have simulated a single-switched element design for vehicular use and also investigated impedance. Here, the interest is confined to simple configurations in order to demonstrate some of the possibilities in mobile and personal communications.…”

Section: Switched Parasite Antennasmentioning

confidence: 99%

Switched parasitic elements for antenna diversity

Vaughan¹

1999

IEEE Trans. Antennas Propagat.

156

View full text Add to dashboard Cite

Switched parasitic elements provide a useful implementation of antenna pattern diversity. The basic principle is presented with some examples of wire antennas computed using the method of moments. The modeled diversity gain available from selection combining of uncorrelated signals is used to quantify the expected improvement relative to nondiversity antennas. The advantage of the switched parasitic concept is that it is a relatively simple system, which can give the adaptive antenna performance of many branch selection or switched diversity.

show abstract

Section: Switched Parasite Antennasmentioning

confidence: 99%

Switched parasitic elements for antenna diversity

Vaughan¹

1999

IEEE Trans. Antennas Propagat.

156

View full text Add to dashboard Cite

show abstract

“…4 shows the cross correlation of one pattern N with the others. The solid curves are the real correlations calculated from the antenna magnitude patterns (2) The dashed curves correspond to the magnitude of the correlation using the complex patterns. The correlations using the complex patterns are always lower than those with magnitude alone but are very close.…”

Section: Introductionmentioning

confidence: 99%

“…concept of the switched parasitic antenna is that active antenna elements do not have to be switched to obtain radiation patterns yielding independent received signals. Milne [2], for example, has previously used switched parasitics for adaptive pattern control for satellite communications. The concept is here embodied by combining an active antenna element into a structure of parasitic antenna elements that act together to form arrays.…”

Section: Introductionmentioning

confidence: 99%

Diversity gain from a single-port adaptive antenna using switched parasitic elements illustrated with a wire and monopole prototype

Scott

Leonard-Taylor²,

Vaughan³

1999

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

A new concept in single-port adaptive antennas using parasitic elements with switched terminating impedances is presented including results from a concept prototype. Each parasitic element can be effectively terminated in three impedance values. The antenna concept provides multiple radiation patterns with a single RF signal port without the need for RF switches or phase shifters in the direct RF signal path. Impedance variations in the active antenna element are minimized by use of only rotationally symmetric configurations. Measured patterns are used to demonstrate the performance improvement expected using switched diversity combining in a simulated uniform scattering scenario. The concept prototype having one active element and four parasitic elements, is shown to have equivalent diversity performance to between three and four uncorrelated branches.Index Terms-Adaptive, averaged uniform scattering scenario, diversity gain, single-port diversity antenna, switched parasitic antenna elements, wire monopole antenna.

show abstract

“…This beam steering technique was adopted and simplified by Milne [2] in early 1980's. Milne replaced the tunable loads with a simple On/Off RF switch (using PIN diodes).…”

Section: Introductionmentioning

confidence: 99%

Switchable beam antenna

Leong

Lee

Hoon

et al. 2013

2013 IEEE International RF and Microwave Conference (RFM)

View full text Add to dashboard Cite

This paper introduces the Switchable Beam antenna which has the ability to shift the direction of the Wi-Fi signal to any specific direction depending on the availability of user. The designs of eight radiating patches are installed in between aluminum plates which are fixed by the edges of the other aluminum plate. This is to represent eight angles where the antenna will radiate. By using switches, the beam of the radiating energy can be adjusted to be directed to a specific area. This antenna is operational at 5.8 GHz which is Wi-Fi frequency. The antenna generated a gain of 4.07 dB while the directivity is 9.986 dBi. Apart from Wi-Fi applications, the design can be customized in different frequency to support different application such as GSM.

show abstract

A small adaptive array antenna for mobile communications

Cited by 17 publications

References 0 publications

Switched parasitic elements for antenna diversity

Switched parasitic elements for antenna diversity

Diversity gain from a single-port adaptive antenna using switched parasitic elements illustrated with a wire and monopole prototype

Switchable beam antenna

Contact Info

Product

Resources

About