TY - JOUR
T1 - A compact quadrature hybrid based on high-pass and low-pass lumped elements
AU - Hou, Jian An
AU - Wang, Yeong Her
N1 - Funding Information:
Manuscript received February 7, 2007; revised March 30, 2007. This work was supported in part by the National Science Council of Taiwan, R.O.C. under Contract NSC95-2221-E-006-428-MY3, and by the Foundation of Chen, Jieh-Chen Scholarship, Tainan, Taiwan.
PY - 2007/8
Y1 - 2007/8
N2 - In this letter, a novel compact quadrature hybrid using low-pass and high-pass lumped elements is proposed. This proposed topology enables significant circuit size reduction in comparison with former approaches applying microstrip branch line or Lange couplers. In addition, it provides wider bandwidth in terms of operational frequency, and provides more convenience to the monolithic microwave integrated circuit layout since it does not have any bulky via holes as compared to those with lumped elements that have been published. In addition, the simulation and measurement of the fabricated hybrid implemented using PHEMT processes are evidently good. With the operational bandwidth ranging from 25 to 30 GHz, the measured results of the return loss are better than 17.6 dB, and the insertion losses of coupled and direct ports are approximately 3.4 ±0.7 dB, while the relative phase difference is approximately 92.3 ±1.4°. The core dimension of the circuit is 0.4 mm × 0.15 mm.
AB - In this letter, a novel compact quadrature hybrid using low-pass and high-pass lumped elements is proposed. This proposed topology enables significant circuit size reduction in comparison with former approaches applying microstrip branch line or Lange couplers. In addition, it provides wider bandwidth in terms of operational frequency, and provides more convenience to the monolithic microwave integrated circuit layout since it does not have any bulky via holes as compared to those with lumped elements that have been published. In addition, the simulation and measurement of the fabricated hybrid implemented using PHEMT processes are evidently good. With the operational bandwidth ranging from 25 to 30 GHz, the measured results of the return loss are better than 17.6 dB, and the insertion losses of coupled and direct ports are approximately 3.4 ±0.7 dB, while the relative phase difference is approximately 92.3 ±1.4°. The core dimension of the circuit is 0.4 mm × 0.15 mm.
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U2 - 10.1109/LMWC.2007.901775
DO - 10.1109/LMWC.2007.901775
M3 - Article
AN - SCOPUS:34547778881
SN - 1531-1309
VL - 17
SP - 595
EP - 597
JO - IEEE Microwave and Wireless Components Letters
JF - IEEE Microwave and Wireless Components Letters
IS - 8
ER -