A dielectric rod leaky-wave antenna with a conducting ground plane

Periodic Microstrip Leaky Wave Antenna with Double-Sided Shorting Pins and Pairs of Slots

International Journal of Antennas and Propagation ◽

10.1155/2020/7101752 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9

Author(s):

Yahuan Chen ◽

Kuang Wang ◽

Yuanxin Li ◽

Yunliang Long

Keyword(s):

Radiation Pattern ◽

Structural Parameters ◽

Ground Plane ◽

Stop Band ◽

Leaky Wave ◽

Rectangular Patch ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

Shorting Pin ◽

Frequency Changes

A backward to forward scanning periodic microstrip leaky wave antenna (MLWA) is presented. The proposed antenna consists of a long rectangular patch with alternating shorting pin on each side, which connects the antenna patch and the ground plane to form periodic shorting circuits. There are two pairs of slots alternately spaced on the long patch to suppress the open stop band (OSB). The OSB problem was initially reduced by optimizing the structural parameters, and the slotting on the patch further improved it. The measured radiation pattern in the y-z plane shows that the antenna can scan electronically from 142° to 39° toward the end-fire (+z direction) when the operating frequency changes from 6 GHz to 12.9 GHz. The measured gain is greater than 5 dBi over the entire operating band.

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Ultrasubwavelength Ferroelectric Leaky Wave Antenna in a Planar Substrate-Superstrate Configuration

International Journal of Antennas and Propagation ◽

10.1155/2014/193690 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9

Author(s):

G. Lovat ◽

P. Burghignoli ◽

R. Araneo ◽

S. Celozzi

Keyword(s):

Ground Plane ◽

Ferroelectric Thin Film ◽

Network Approach ◽

Equivalent Network ◽

Leaky Wave ◽

Beam Radiation ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

Planar Substrate ◽

Fabry Perot

The possibility of achieving directive fan-beam radiation with planar Fabry-Pérot cavity antennas constituted by an upper ferroelectric thin film and a lower ground plane having ultrasubwavelength thickness is studied by means of a simple transverse-equivalent-network approach and a cylindrical leakywave analysis, deriving simple design formulas. The performance of the proposed antenna is investigated in terms of power density radiated at broadside and directivity in the principal planes, pointing out the main limitations and tradeoffs associated with the reduced thickness.

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High Efficiency and Broadband Microstrip Leaky-Wave Antenna

Active and Passive Electronic Components ◽

10.1155/2008/742050 ◽

2008 ◽

Vol 2008 ◽

pp. 1-6

Author(s):

Onofrio Losito

Keyword(s):

Dielectric Constant ◽

Theoretical Analysis ◽

High Efficiency ◽

Simple Procedure ◽

Ground Plane ◽

Relative Dielectric Constant ◽

Leaky Wave ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

Conductor Strip

A novel layout of leaky-wave antennas based on tapered design has been proposed and investigated. The new tapered leaky-wave antenna (LWA) was designed running a simple procedure which uses an FDTD code, and using a suitable metal walls down the centerline along the length of the antenna connecting the conductor strip and the ground plane, which allows to use only half of the structure, the adoption of a simple feeding, and the reduction of sidelobes. The good performance of this new tapered microstrip LWA, with reference to conventional uniform microstrip LWAs, is mainly the wider band of 33% for VSWR<2, higher gain (12 dBi), and higher efficiency (up to 85%). Furthermore, from the theoretical analysis we can see that, decreasing the relative dielectric constant of the substrate, the bandwidth of the leaky-wave antenna becomes much wider, improving its performance.

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