Wideband microstrip-fed tapered slot antennas and phased array

Abstract

Two wideband tapered slot antennas are designed, fabricated, and tested. The first antenna, which is fabricated on a high dielectric constant substrate (e r 5 10.2), shows a measured return loss of better than 10 dB from 1.6 to 12.4 GHz (7.7:1 bandwidth), and an antenna gain varying from 3.6 to 7.8 dBi. The second antenna is built on a low dielectric constant substrate (e r 5 2.2), and demonstrates return loss of better than 10 dB from 1.8 to 15.2 GHz (8.4:1 bandwidth). The second antenna also has improved antenna gain, from 5 to 15.6 dBi, and is used to build a wideband 1 3 4 H-plane phased array with a total gain of 9-17 dBi and a beam steering angle of 6158 from 3 to 12 GHz.

Wideband stripline fed tapered slot antenna with integral coupler for wide scan angle active phased array

“…One of the serious drawbacks of microstrip-fed planar TSA is the difficulty in the impedance matching of the slotline at the input of the antenna. Slotlines fabricated on a low dielectric constant substrate have high impedance, which makes the matching to a 50 Ω feed difficult [15,16]. The same issue persists with stripline fed planar TSA such as the one reported in [17].…”

“…As a result, it can be fed directly from 50 Ω stripline without impedance matching transformers. Impedance bandwidth of 3:1 is achieved in this design by using a radial stub and circular cavity, which acts as virtual short and open, respectively [15]. The optimal dimensions of the feed structure obtained by simulations are given in Table 2.…”

An active,ultra‐wideband dual‐polarizedtightly coupled dipole subarray for satellite communication

“…Traditionally, the tapered‐slot array (TSA) is widely employed for ultra‐wideband front‐end designs 8‐12 . However, wideband impedance matching in TSAs is usually achieved at the cost of increased profile heights.…”