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3-dB axial ratio beamwidth

Compact Dual-Band Circularly Polarized Patch Antenna with Wide 3-dB
 Axial Ratio Beamwidth for BeiDou
 Applications

Compact Dual-Band Circularly Polarized Patch Antenna with Wide 3-dB Axial Ratio Beamwidth for BeiDou Applications

... wide 3-dB axial ratio beamwidth (ARBW) is presented for BeiDou Navigation System ...The 3-dB axial ratio (AR) bandwidths for the lower and upper bands are ...

11

A Novel Circularly Polarised Antenna with Wide Power and Axial-Ratio Beamwidth by Using Tilted Dipoles

A Novel Circularly Polarised Antenna with Wide Power and Axial-Ratio Beamwidth by Using Tilted Dipoles

... with 3-dB axial-ratio beamwidth (ARBW) wider than 120 ◦ can transmit and receive signals at any place on the earth in GPS and ...The 3-dB ARBW of the CP antenna can be ...

7

A Compact Wideband Circularly Polarized Crossed-Dipole Antenna with Broad Beamwidth

A Compact Wideband Circularly Polarized Crossed-Dipole Antenna with Broad Beamwidth

... half-power beamwidth (HPBW) and broad 3 dB axial ratio beamwidth (ARBW) is ...and 3 dB axial ratio (AR) ...a 3 dB AR bandwidth ...The ...

7

A Novel High-Gain Directional Lens Antenna for Terahertz Band

A Novel High-Gain Directional Lens Antenna for Terahertz Band

... 23.8 dB to 24.9 dB with the same variation tendency of the simulation ...tested 3 dB main lobe beamwidth is in agreement with the simulation results in general within the range of ...

11

Optimization of Three-Dimentional (3-D) Ground Structure for Improved Circularly Polarized Microstrip Antenna  Beamwidth

Optimization of Three-Dimentional (3-D) Ground Structure for Improved Circularly Polarized Microstrip Antenna Beamwidth

... Figure 1 shows the geometry of a regular circularly polarized microstrip antenna mounted on the proposed 3-D circular ground structure. The side lengths of the square patch and truncated corners are L and ∆d, ...

9

Design of Miniaturized Rat-Race Couplers with Arbitrary Power Division Ratios

Design of Miniaturized Rat-Race Couplers with Arbitrary Power Division Ratios

... division ratio is proposed in this ...division ratio are derived using even-odd decomposition ...20 dB rat-race coupler operating at 1 GHz with ...

7

Axial Ratio Enhancement of Equilateral Triangular-Ring Slot Antenna Using Coupled Diagonal Line Slots

Axial Ratio Enhancement of Equilateral Triangular-Ring Slot Antenna Using Coupled Diagonal Line Slots

... wide 3-dB ARBW close to its impedance ...improve 3-dB ARBW of the modified ETRS antenna, two different lengths of diagonal line slots are loaded into the antenna on the left and right sides of ...

11

Compact Wide-Beam Circularly Polarized Antenna with Stepped Arc-Shaped Arms for CNSS Application

Compact Wide-Beam Circularly Polarized Antenna with Stepped Arc-Shaped Arms for CNSS Application

... size, 3-dB AR beamwidth and average gain at 5 ◦ elevation ...a 3-dB AR beamwidth of more than 120 ◦ at both XZ - plane and Y Z ...wide 3-dB AR beamwidth and ...

8

Cellular Communications Using Aerial Platforms

Cellular Communications Using Aerial Platforms

... When transactions are relatively local, then delay constraints can be relaxed, but attention must be given to the minimization of delay when we are considering transactions on a global basis. As an example, for an ocean ...

15

Design of a Circularly Polarized Microstrip Antenna for WLAN

Design of a Circularly Polarized Microstrip Antenna for WLAN

... In proximity coupled microstrip antenna, the radiating patch, fabricated on a dielectric substrate, is excited by a microstrip line on another substrate, fed by a co-axial SMA connector, as shown in Fig. 1. The ...

12

ENERGY EFFICIENT DISTRIBUTED IMAGE COMPRESSION USING JPEG2000 IN WIRELESS SENSOR 
NETWORKS (WSNS)

ENERGY EFFICIENT DISTRIBUTED IMAGE COMPRESSION USING JPEG2000 IN WIRELESS SENSOR NETWORKS (WSNS)

... void ratio is similar to that of axial stress, namely increasing or decreasing simultaneously, under vibration ...load. Axial stress and shear strength is also smaller when void ratiois smaller, and ...

5

Broadband and Small-Size 3-dB
 Ring Coupler

Broadband and Small-Size 3-dB Ring Coupler

... Fig. 3(a) may be computed by imposing the same input impedance for a stub of characteristic impedance Z c2 / and a stub of characteristic impedance 2Z c2 / , at the central working ...The ratio between the ...

6

The Axial Ratio of Planar Arrays with Random Element Errors

The Axial Ratio of Planar Arrays with Random Element Errors

... We observe that considering the feeding errors to be independent identically distributed Gaussian variables, the expression in Equation (19) leads to a Rayleigh probability density function. Equation (19) also predicts ...

6

A New Spiral Antenna with Improved Axial Ratio and Shorted Arm Length

A New Spiral Antenna with Improved Axial Ratio and Shorted Arm Length

... Figure 3 demonstrates the simulated axial ratio performance for the three ...the axial ratio of new spiral and power spiral has an improvement caused by the relatively tighter wrapping ...

7

Miniaturization of Broadband 3-dB
 Branch-Line Coupler

Miniaturization of Broadband 3-dB Branch-Line Coupler

... simulation and measurement, except for a little frequency shifting and bandwidth reduction. Frequency shifting and bandwidth reduction may be caused by SMA connectors and weld of chip capacitors. The comparison among the ...

8

A Stacked Broadband Circularly Polarized Microstrip Antenna

A Stacked Broadband Circularly Polarized Microstrip Antenna

... Figure 3 shows the standing wave ratio with frequency change, and the impedance bandwidth (SWR≤2) is ...the axial ratio of the entire working frequency band is less than ...

7

Compact monopole antenna for wireless USB dongle applications

Compact monopole antenna for wireless USB dongle applications

... Antenna impedance is a ratio of voltage over current at any point in the antenna. The ability of accept power from a source for an antenna is determined by the input impedance the antenna presents. If the input ...

35

On the electric field transient anomaly observed at the time of the Kythira =6.9 earthquake on January 2006

On the electric field transient anomaly observed at the time of the Kythira =6.9 earthquake on January 2006

... The fact that the neuro-fuzzy model follows closely the recorded electric field signal before (signal to difference ratio of 30.46 dB) and after (signal to difference ratio of 28.40 dB) [r] ...

6

A Terahertz Quarter Wave Plate Based on Staggered Split Ring Resonators

A Terahertz Quarter Wave Plate Based on Staggered Split Ring Resonators

... Abstract—In this paper, we propose a transmissive quarter wave plate (QWP) which can provide linear-to-circular polarization conversion in terahertz (THz). The structure is composed of one dielectric layer with staggered ...

7

Design of a Wideband Circularly Polarized Cross-Dipole with Wide Axial-Ratio Beamwidth

Design of a Wideband Circularly Polarized Cross-Dipole with Wide Axial-Ratio Beamwidth

... wide 3 dB AR beamwidth is ...gain beamwidth and 3 dB AR beamwidth of the cross-dipole, and the bandwidth is broadened by using a microstrip coupled feeding ...10 ...

7

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