A compact Gysel power divider design using U-shaped and T-shaped resonators with harmonics suppression. Issue 7 (3rd October 2019)

• Record Type: Journal Article
• Authors: Jamshidi, Mohammad (Behdad); Siahkamari, Hesam; Roshani, Saeed; Roshani, Sobhan
• Is Part Of: Electromagnetics. Volume 39:Issue 7(2019)
• Page Start: 491
• Page End: 504
• Publication Date: 2019-10-03
• Subjects: Gysel power divider -- microwave -- resonator -- size reduction -- transmission zero -- harmonic suppression; Electromagnetism -- Periodicals; 537
• DOI: 10.1080/02726343.2019.1658165
• Languages: English
• ISSNs: 0272-6343

Abstract

ABSTRACT: In this paper, design process of a new compact microstrip Gysel power divider (GPD) with harmonics elimination is proposed. In the designed GPD structure, two types of resonators are applied to make transmission zeros (TZs). T-shaped resonator makes one TZ at lower frequency and U-shaped resonator makes two TZs at higher frequencies. These three created transmission zeroes by applied resonators result in the good harmonics suppressing in the Gysel divider. The LC-equivalent circuit (LCEC) of the resonators is extracted and the locations of these three transmission zeroes are calculated analytically. The proposed GPD creates three transmission zeros at near 3 GHz, 4.9 GHz, and 9.1 GHz. The proposed Gysel power divider (GPD) with applied resonators reduces the circuit size more than 66% (occupied 34% size) compared with the conventional GPD with λ/4 transmission lines. Moreover, the fractional bandwidth of the proposed divider is 50% and also suppresses up to seventh harmonic.