Compact Ka-Band Magic-T Using Waveguide to Microstrip Dual-Probe Transition

A Compact and Broadband Magic Tee with Waveguide Filter for Ka-Band System

“…The 3D structure and the simulation results of the waveguide filter are shown in Figures 5(a To demonstrate the proposed Magic Tee, the Magic Tee and waveguide filter have been designed at the target bandwidth 27.525-28.85 GHz by following the procedure below. Table 1 shows the results of performance comparison of the proposed Magic Tee with previously published works [5,6,9]. As shown in Table 1, [6] has better bandwidth performance than the proposed Magic Tee, since our target is for a Magic Tee filter with a Ka-band system in target bandwidth of 27.525-28.85 GHz.…”

“…Table 1 shows the results of performance comparison of the proposed Magic Tee with previously published works [5,6,9]. As shown in Table 1, [6] has better bandwidth performance than the proposed Magic Tee, since our target is for a Magic Tee filter with a Ka-band system in target bandwidth of 27.525-28.85 GHz. However, [6] uses microstrip dual-probe transition, which limits the power-handling capability.…”

“…As shown in Table 1, [6] has better bandwidth performance than the proposed Magic Tee, since our target is for a Magic Tee filter with a Ka-band system in target bandwidth of 27.525-28.85 GHz. However, [6] uses microstrip dual-probe transition, which limits the power-handling capability. Thus, it is not affordable for the Ka-band system even if it operates over a wide Ka-band.…”

“…However, these only showed limited bandwidth or a return loss (RL) of about 9.5 dB. Magic Tees with coplanar arms were proposed in [4,5]; although [4] has the same arm plane, the microstrip section causes transmission losses with limited power-handling capability [4,6]. In [5], which did not have a microstrip unit, although high power-handling capability was reported, the size was considered large owing to the ridge waveguide transitions for impedance matching.…”