Switchable Diplexer Based on Coupling Control

Xu, Jin-Xu; Zhan, Wan-Li; Li, Hui‐Yang; Zhang, Xiu Yin

doi:10.1109/tcsii.2020.3003913

Cited by 9 publications

(6 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This integration approach requires only one circuit without compromising system functionality; this approach is practically beneficial in enhancing system compactness, reducing circuit area, and reducing costs. In recent years, several research teams have focused on developing switchable diplexers [15]- [23]. For example, in [15], a diplexer was developed using two parallel-coupled BPFs operating in different frequency bands; in this diplexer, diodes are connected to the first-stage resonator, which enables the resonance frequency to be altered by applying an external bias, thus achieving ON-OFF passband switching.…”

Section: (A)mentioning

confidence: 99%

Flexible Design Method for Multifunctional Filtering Diplexers Integrated With Single-Pole Double-Throw Switches

Chen,

Tsai,

Chen

et al. 2024

IEEE Access

View full text Add to dashboard Cite

This paper presents a novel design method for multifunctional filtering diplexers integrated with single-pole double-throw switches having three operating modes: Modes 1-3. Modes 1 and 2 involve the operation of switchable filters with different frequencies, which are suitable for time-division duplexing (TDD) systems . Mode 3 involves the operation of switchable diplexers, which are suitable for TDD and frequency-division duplexing (FDD) systems. The proposed design method is based on distributed coupling technology and can thus offer a high degree of design flexibility, particularly in terms of controlling the filter order, bandwidth, and number of channels. To demonstrate the feasibility and design flexibility of the proposed method, it was used to design and fabricate second-and fourth-order multifunctional diplexers; the designed diplexers were then assessed through electromagnetic simulations and experimental measurements. The simulation results were in good agreement with the experimental results, thereby validating the feasibility and design flexibility of the proposed method. The results indicated that the second-and fourth-order multifunctional diplexers occupied small circuit areas (approximately 0.098 𝜆𝜆 𝑔𝑔 2 and 0.198 𝜆𝜆 𝑔𝑔 2 , respectively). In addition to their multifunctional characteristics and high design flexibility, the multifunctional diplexers exhibited satisfactory performance, including an in-band insertion loss of < 2.5 dB in the ON state, an inband attenuation of > 42 dB in the OFF state, and a port-to-port isolation of > 48 dB.INDEX TERMS Bandpass filters (BPFs), diplexers, microstrip, multifunctional components, single-pole double-throw (SPDT) switches.

show abstract

Section: (A)mentioning

confidence: 99%

Flexible Design Method for Multifunctional Filtering Diplexers Integrated With Single-Pole Double-Throw Switches

Chen,

Tsai,

Chen

et al. 2024

IEEE Access

View full text Add to dashboard Cite

show abstract

“…There are two methods for the diplexer design. One is usually based on optimizing an error function, which is a time-consuming process [5,6], and the other is analytical methods based on the design of two separate filters and a coupling matrix [7,8]. The fabrication methods of diplexers are based on printed circuit technology [7][8][9][10][11] and waveguides [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…One is usually based on optimizing an error function, which is a time-consuming process [5,6], and the other is analytical methods based on the design of two separate filters and a coupling matrix [7,8]. The fabrication methods of diplexers are based on printed circuit technology [7][8][9][10][11] and waveguides [12,13]. In [10], an input reflectionless low-pass filter was presented, which consists of a reflective network implemented with a microstrip resonator and a resistive termination, and in [8], a switchable diplexer was presented by using pin diodes.…”

Section: Introductionmentioning

confidence: 99%

“…The fabrication methods of diplexers are based on printed circuit technology [7][8][9][10][11] and waveguides [12,13]. In [10], an input reflectionless low-pass filter was presented, which consists of a reflective network implemented with a microstrip resonator and a resistive termination, and in [8], a switchable diplexer was presented by using pin diodes. The main advantages of printed circuit-based diplexers are the simplicity of construction and the possibility of combining with the lumped elements.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Surface Wave Diplexer Based on Tensor Impedance Surfaces

Mighani¹

2022

PIER C

View full text Add to dashboard Cite

In this paper, a new Surface Wave (SW) diplexer in frequency bands of 11.6 GHz and 19.3 GHz is presented based on the frequency variations of the refractive angle when an SW enters from a Scalar Impedance Sheet (SIS) to a Tensor Impedance Sheet (TIS). In this structure, a SIS has been placed alongside a TIS, and using three launchers, SW is excited and received on them. To achieve an SW diplexer, the structure is designed in a way that the refractive angle changes in the expected range when SW enters from SIS to TIS. Finally, the proposed structure is fabricated and measured by printed circuit technology. The measurement results at 11.6 GHz and 19.3 GHz show that this structure has 3.6 dB and 4.1 dB insertion losses and 33.5 dB and 37 dB isolations in the two bands, respectively. These measurements are in good agreement with mathematical modelling and simulations.

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%

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

Switchable Diplexer Based on Coupling Control

Cited by 9 publications

References 15 publications

Flexible Design Method for Multifunctional Filtering Diplexers Integrated With Single-Pole Double-Throw Switches

Flexible Design Method for Multifunctional Filtering Diplexers Integrated With Single-Pole Double-Throw Switches

A Novel Surface Wave Diplexer Based on Tensor Impedance Surfaces

Design of diplexer with direct synthesis method for ground penetrating radar

Contact Info

Product

Resources

About