(IEEE, 2023) Haddad, Thomas; Biurrun Quel, Carlos; Lu, Peng; Kaya, Hacer; Mohammad, Israa; Stöhr, Andreas; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
This paper reports on a periodic microstrip
Leaky-wave antenna (LWA). The open stopband issue is
suppressed by altering the unit cell using a matching stub. The
developed LWA is based on a grounded InP-substrate of
50 µm and has been fabricated and characterized between 0.23
to 0.33 THz. The dispersion diagram of the designed unit cell
shows enhancement of the attenuation constant at the
broadside frequency of 0.273 THz and about 50% less
deflection at the broadside region on the Bloch impedance
curves, consequently better impedance matching at the input.
The simulated scattering parameters of the proposed LWA
show that the return loss S11 is below 17 dB except for the
broadside, which has a value of 13.8 dB. Furthermore, the
beam steering capabilities of the antenna are simulated in the
WR3.4 band and confirmed experimentally between 0.26 and
0.33 THz proving the beam direction to steer from −12° to
+33°, respectively.
