Balanced-to-Balanced Diplexer and Quadruplexer With High Selectivity and Wide CM Suppression

Wei, Feng; Cheng, Xing; Liu, Ya Xin; Shi, Xiao Wei

doi:10.1109/tcsii.2020.2970730

Cited by 15 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6][7][8][9][10][11][12][13][14][15][16][17] However, on the one hand, the cavity-coupled method often suffers from narrow bandwidth; on the other hand, the via vertical transitions suffer from a high-frequency parasitic effect. 11 In recent years, the utilization of the slotline structure to construct the high-performance microwave circuits based on the vialess vertical transitions using slotline resonator, has become a popular research topic, such as filters, [6][7][8][9][10][11][12][13][14][15][16] power divider, 18 duplexer, 19 and so on.…”

Section: Introductionmentioning

confidence: 99%

A novel MS to SL vialess vertical transition for high‐performance substrate integrated filter

Zhang

Feng

et al. 2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

In this paper, a novel broadband microstrip-to-stripline (MS-to-SL) vialess vertical transition structure is presented and demonstrated. Firstly, the vialess vertical transition is introduced under two kinds of transmission lines and signal transmission between them through the slotline in the middle ground layer is realized. Then, the proposed vialess vertical transition structure is applied to build up a six-pole broadband high selective bandpass substrate integrated filter with an equal ripple level. After that, for fascinating the design, its design method is analyzed, and design flow is given. Finally, the proposed filter is fabricated and measured. All the simulated and measured results match well with each other.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel MS to SL vialess vertical transition for high‐performance substrate integrated filter

Zhang

Feng

et al. 2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

show abstract

“…A common way to design a diplexer is to use two filters, such as a lowpass filter and a bandpass filter, [3][4][5][6] or two bandpass filters, [7][8][9][10][11][12] or a lowpass filter and a highpass filter. 13 Several approaches are used in designing filters for diplexers.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches are used in designing filters for diplexers 8 . uses composite resonators (CRs), 9 uses open loop ring resonators (OLRRs), and 10 uses stub‐loaded resonators. However, due to the approximate condition have been used, they are only suitable for narrowband designs.…”

Section: Introductionmentioning

confidence: 99%

Design of diplexer with direct synthesis method for ground penetrating radar

Dai

Yang

et al. 2022

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

This paper proposes a direct synthesis method for diplexer with wide fractional bandwidth (115.4%) of the second passband and a narrow isolation bandwidth (190 MHz) between the two passbands in the frequency domain and almost no tailings of the output signals in the time domain. This diplexer is designed for pulsed ground penetrating radar (GPR), which takes both the time domain and frequency domain responses into consideration. This method is able to synthesize diplexers with low insertion loss and high rejection in the frequency domain while avoiding tailing of the output signal in the time domain. Additionally, a T-junction with alternated stepped impedance line (SIL) is proposed, this significantly reduces the length of the junction by 40% and at the same time widens the bandwidth of the second passband by 78.6%. As a design example, a diplexer operating at DC-540 MHz and 730-2720 MHz is designed and fabricated, showing IL of 0.9 dB and rejection of 24 dB, while the width of the signal in the time domain is unchanged. The measurement results are in good agreement with the simulated ones, proving the effectiveness of the design.

show abstract

“…Recently, with the development of microwave technology, balanced circuits have been widely used owing to the better performance in terms of SNR and EM interference immunity. As an important front-end device in modern communications, the research on balanced diplexers is of great importance [21][22][23][24][25][26][27][28][29][30][31][32][33]. In [27], the SRR is used to design the balanced diplexer combined with a balanced T-junction input port.…”

Section: Introductionmentioning

confidence: 99%

Compact balanced diplexer based on hairpin split ring resonators with high isolation performance

Kuang¹,

Liu²,

Feng³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

In this paper, a compact balanced diplexer using a novel hairpin split ring resonator (H-SRR) is presented and demonstrated. First, the working principle of the proposed H-SRR is described, which shows a negative permittivity or a negative permeability in the stopband. It can be used to construct compact passive components and improve the stopband rejection performance. Then, the differential-mode (DM) excitation and common-mode (CM) excitation are investigated, respectively. Under DM operation, the H-SRR can provide one DM resonant mode. Under CM operation, the H-SRR can excite two CM resonant modes far from the DM resonant mode, thus producing a desired CM rejection performance. Moreover, by introducing a mixed electromagnetic coupling, transmission zeros are produced, significantly improving the DM isolation between the two channels. Finally, a balanced diplexer is designed and fabricated. The lower and higher channels of the diplexer are centered at 3.36 and 4.00 GHz. The DM channel isolation is better than 40/41 dB in the two passbands when the frequency ratio is less than 1.2, which is in satisfactory agreement with the simulated results.

show abstract

Balanced-to-Balanced Diplexer and Quadruplexer With High Selectivity and Wide CM Suppression

Cited by 15 publications

References 16 publications

A novel MS to SL vialess vertical transition for high‐performance substrate integrated filter

A novel MS to SL vialess vertical transition for high‐performance substrate integrated filter

Design of diplexer with direct synthesis method for ground penetrating radar

Compact balanced diplexer based on hairpin split ring resonators with high isolation performance

Contact Info

Product

Resources

About