The main lobe
directions of Configuration 1 and Configuration 2 are about 46[degrees] and 0[degrees], respectively, with copolarized gains of 11.7 dB and 10.68 dB.
The measured data clearly showed that the expression of fluorescence protein can diffuse in different directions with respect to the fibers main lobe
The above simulations show that the roughness of the 3D fractal surface can be characterized by the mean slope between the main lobe
of function [absolute value of [gamma](k)] and the first two side-lobes, adjacent to the main lobe
Half-power beamwidth is the angular extent by which the power response has fallen to half of the maximum level of the main lobe
. Since the half-power coincides with a 3 dB drop in power level, it is often called 3 dB beamwidth ([BW.sub.-3dB]).
Both surface and volume model exhibit relatively good agreement of radiation pattern trace in the main lobe
, as seen in Fig.
Based simulated annealing optimization method, we selected two objective functions, MLA (main lobe
area) and SLR (side lobe ratio), which are the parameters of measurement criteria for evaluation of identification results, and we tend to get the value of MLA, the smaller the better, and the value of SLR, the bigger the better, or to get the balance between them.
Frequency Peak Main lobe Main lobe
3-db (GHz) gain (dB) magnitude direction beam width (dBi) 5.2 5.85 6.2 10[degrees] 86[degrees] 8.3 6.2 5.9 50[degrees] 53.7[degrees] 9.5 3.9 6.5 31[degrees] 43.9[degrees] 12.2 5.9 8.6 50[degrees] 42.1[degrees] 14.6 4.7 4.7 10[degrees] 30.1[degrees]
When t = 0, [h.sub.TR](t) is maximum among the main lobe
and it is unrelated with the delay time r of multipath components; namely, [h.sub.TR](t) is a superposition of the autocorrelation function of each propagation path.
16 dB, and main lobe
direction increased by 4 degree with less side lobe level.
The azimuth resolution is typically defined as the 3-dB-level width of the main lobe
of the SAP.
Next, we choose D = dN and set the phase of the two added elements to be equal to P = -[pi] + 1/2 kD sin [[theta].sub.peak] so that the main lobe
of the two-element array pattern is aligned to the main lobe
of the sum pattern at the target direction and then to set the amplitude of the two added elements, A, to place a null in the direction of the desired signal (i.e., [AF.sub.Diff] [([theta])|[sub.[[theta]=[theta].sub.peak]] = 0).
This window can be seen as the convolution of two half-sized rectangular windows (for N even), giving it a main lobe
width of twice the width of a regular rectangular window.