array is depicted as well as a five-element array featuring the ease with which amplitude taper may be
implemented.
Recall from the introductory material that the width,
W, of the conductor is a determining factor with
regard to directivity and impedance.
23
It is also instructive to view the equivalent circuit of
the series arrangement in combination with
admittance elements developed from the
transmission line and cavity models, as illustrated in
Figure 15.
The equivalent circuit has demonstrated utility in
providing reasonable initial values for the element
dimensions and the connecting line impedance.
Using the single element microstrip antenna initially investigated and empirical adjustment of element width to
produce an amplitude taper, a 1-x-5 array has been constructed and an EM analysis executed. The results are
graphically illustrated in Table 8.
23
See equations 5 and 12.
a. N-Element Series Feed Microstrip Array
b. 5-Element Series Feed Microstrip Array with Amplitude Taper
Figure 14: Series Feed Microstrip Array
Figure 15: Series Feed Microstrip Array
Microstrip Antenna Design
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