Table 3 Nomenclature of important parameters
From: Bio-inspired optimization algorithms applied to rectenna design
F | Center frequency of antenna | A e | Antenna efficiency of antenna |
B | Band width of antenna | R L | Return loss of antenna |
P in | Input power of rectenna | P out | Output power of rectenna |
η a | Efficiency of antenna | η m | Efficiency of matching circuit |
η r | Efficiency of rectifier circuit | P T | Transmitted power from source |
W | Width of RMPA | L | Length of RMPA |
W 0 | Feed width of RMPA | L d | Inset feed length |
g | Notch width | ε 0 | Vacuum dielectric constant |
X min | Minimum constraint of antenna size | X max | Maximum constraint of antenna size |
μ 0 | Vacuum permeability | Z in | Antenna input impedance |
Γ | Voltage reflection coefficient | VSWR | Voltage standing wave ratio |
Q rad | Quality factor due to radiation losses | Q c | Quality factor due to conduction losses |
Q d | Quality factor due to dielectric losses | Q sw | Quality factor due to surface waves |
Q t | Total quality factor | tanδ | Loss tangent of the substrate material |
G | Antenna gain | v 0 | The speed of EM wave |
k 0 | Spatial angular frequency of wave | G abs | Absolute gain |
P rad | Radiation power of antenna | U max | Maximum radiation intensity |
D 0 | Directivity of antenna with single slot | D AF | Directivity of array factor AF |
e BW | Efficient bandwidth ratio | F AL | Aimed lower conner frequency |
F AH | Aimed upper conner frequency | F DL | Designed lower conner frequency |
F DH | Designed upper conner frequency | σ | Conductivity of patch |
D | Directivity of antenna | e cd | ntenna Radiation efficiency |