Design and construction of dual-mode micro-strip resonator filters for the 950–1,450 MHz band: Application as IF filters in microwave transceivers

Rodriguez-Meneses, Luis A.; Gutiérrez‐Martínez, C.; Meza-Perez, Jacobo; Torres-Fortiz, J.A.; Murphy‐Arteaga, Roberto S.

doi:10.1109/lascas.2018.8399962

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Therefore, there is a shapely increasing market demand of 5G band-pass filters (BPFs), which can meet the requirements of excellent performances, small size, and comparative higher density packaging. Conventional dual-mode BPFs obtain a half size compared with single-mode ones; however, those BPFs do not show a function of harmonics suppression or a performance of wide stopband [3,4]. Modern radio frequency (RF) transceiver is a nonlinear system, and harmonics suppression and wide stopband characteristics are vital for the RF front-ends.…”

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confidence: 99%

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Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Luo¹,

Tie²,

Ma³

et al. 2021

PIER Letters

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A compact dual-mode band-pass filter (BPF) with 7th-order harmonics suppression is proposed. The proposed dual-mode BPF is designed using a three-section stepped-impedance-variable feeding line (SIVFL) and a square resonator. The high-order harmonics suppression is achieved by the SIVFL structures, and the size reduction is achieved using meandered lines and a resonator with two degenerate modes. The proposed BPF has a wide stopband up to 7th-order harmonics and a compact size of only 7 × 7 × 0.3 mm. The proposed BPF is suitable for the fifth-generation (5G) N77 band applications due to its working frequency, compact size, and good performance. Comparison and discussion are implemented as well. INTRODUCTIONCurrently, owning to the high-capacity and speed of data transmission, the fifth-generation (5G) mobile communication has been on its excellent operation. The most attractive bands for 5G new radio (NR) are N77 (3.3-4.2 GHz), N78 (3.3-3.8 GHz), and N79 (4.4-5 GHz) [1,2]. Therefore, there is a shapely increasing market demand of 5G band-pass filters (BPFs), which can meet the requirements of excellent performances, small size, and comparative higher density packaging. Conventional dual-mode BPFs obtain a half size compared with single-mode ones; however, those BPFs do not show a function of harmonics suppression or a performance of wide stopband [3,4]. Modern radio frequency (RF) transceiver is a nonlinear system, and harmonics suppression and wide stopband characteristics are vital for the RF front-ends. Although low-pass filters can be added into circuits for harmonics suppression, adding extra low-pass filters will result in a huger circuit size and a higher cost of manufacture. BPFs with harmonic suppression are proposed in [5][6][7], but those BPFs have complicated structures, low level integration, and high in-band insertion loss.In this letter, a compact dual-mode BPF using stepped-impedance-variable feeding lines (SIVFLs) and a ring resonator is proposed and fabricated on a 2-layer low temperature co-fired ceramic (LTCC) substrate. The SIVFLs are used to suppress the high-order harmonics, and the ring resonator is used to excite two degenerate modes. The merits of the proposed BPF are harmonics suppression up to 7th-order and 60% size reduction. CIRCUIT DESIGNThe BPF is designed to cover 5G N77 band. The center frequency is 3.75 GHz, and the bandwidth is 0.9 GHz. The structure of the proposed dual-mode BPF is established in a 2-layer LTCC substrate, shown in Figure 1. The input/output (I/O) feeding lines with three-section SIVFLs are placed on the first layer, and the square ring resonator used to excite two degenerate modes is placed on the second

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“…The structure of BPF, which is symmetrical at 45 degrees shown in Figure 2, cites six parameters: microstrip line lengths (L 1 , L 2 , L 3 ) and widths (W 1 , W 2 , W 3 ). By altering the step impedance, the BPF's characteristic curve can be adjusted flexibly during the design process with Equations ( 1)- (3).…”

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confidence: 99%

Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Luo¹,

Tie²,

Ma³

et al. 2021

PIER Letters

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Dual-mode LTCC Filter with 4^th-order Harmonic Suppression for 5G N78 Applications

Tie

Luo

Song

et al. 2021

2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Compact and Wide Stopband Dual-mode LTCC Filter for 5G N79 Band Applications

Zhang,

Pan,

et al. 2023

2023 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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Design and construction of dual-mode micro-strip resonator filters for the 950–1,450 MHz band: Application as IF filters in microwave transceivers

Cited by 3 publications

References 9 publications

Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Dual-mode LTCC Filter with 4^th-order Harmonic Suppression for 5G N78 Applications

Compact and Wide Stopband Dual-mode LTCC Filter for 5G N79 Band Applications

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Design and construction of dual-mode micro-strip resonator filters for the 950–1,450 MHz band: Application as IF filters in microwave transceivers

Cited by 3 publications

References 9 publications

Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Compact LTCC Filter With 7th-Order Harmonics Suppression for 5g N77 Band Applications

Dual-mode LTCC Filter with 4th-order Harmonic Suppression for 5G N78 Applications

Compact and Wide Stopband Dual-mode LTCC Filter for 5G N79 Band Applications

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Product

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Dual-mode LTCC Filter with 4^th-order Harmonic Suppression for 5G N78 Applications