Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Chuma, Euclides Lourenço; Iano, Yuzo; Cardoso, Paulo Eduardo dos Reis; Loschi, Hermes; Pajuelo, Diego

doi:10.18580/setijbe.2018.7

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Laboratory experiments in refs. [30][31][32][33] confirmed the effectiveness of low-pass filters in reducing IMT interference in digital TV channels. Ref.…”

Section: Introductionmentioning

confidence: 70%

Co-Channel Compatibility Analysis of IMT Networks and Digital Terrestrial Television Broadcasting in the Frequency Range 470–694 MHz Based on Monte Carlo Simulation

Taha,

Vári,

Nagy

2023

Sensors

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According to Resolution 235 adopted during the World Radiocommunication Conference 2015 (WRC-15) and the preliminary agenda item 1.5 of WRC-2023, the International Telecommunication Union Radiocommunication Sector (ITU-R) has been entrusted to carry out sharing and compatibility studies between broadcasting and mobile services in the frequency range 470–694 MHz in Region 1. This study specifically focuses on evaluating electromagnetic compatibility in potential co-channel sharing scenarios between Digital Terrestrial Television Broadcasting (DTTB) and International Mobile Telecommunications (IMT) systems within the 470–694 MHz frequency band that may arise in the foreseeable future. To assess the conditions for coexistence, a Monte Carlo simulation method implemented through the SEAMCAT software version 5.4.2 is employed, examining six potential interference scenarios. The simulation results yield the minimum coordination distance required between IMT and DTTB services in the 470–694 MHz band based on the protection criteria to ensure harmonious coexistence while maintaining satisfactory performance. Furthermore, the study investigates the impact of various factors such as transmitter power, antenna heights, coverage radius, antenna discrimination, and antenna tilt angle on the separation distances. The focus lies primarily on critical interference scenarios across neighboring countries’ borders. The simulation outcomes confirm that sharing the same frequency band between IMT and DTTB networks would result in significant mutual interference. Nevertheless, carefully analyzing diverse parameters and assumptions helped provide recommendations to reduce the required separation distances. These findings are valuable for broadcasters, mobile operators, and regulators in establishing the technical coexistence conditions for DTTB and IMT in the new band.

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“…Laboratory experiments in refs. [30][31][32][33] confirmed the effectiveness of low-pass filters in reducing IMT interference in digital TV channels. Ref.…”

Section: Introductionmentioning

confidence: 70%

Co-Channel Compatibility Analysis of IMT Networks and Digital Terrestrial Television Broadcasting in the Frequency Range 470–694 MHz Based on Monte Carlo Simulation

Taha,

Vári,

Nagy

2023

Sensors

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“…The findings provided insights for optimizing LTE network configurations in the future. A notable contribution in [24][25][26][27] is the introduction of an innovative band-stop filter designed to enable DTTB reception in the presence of LTE interference. Laboratory tests conducted on these filters demonstrated strong alignment with simulations.…”

Section: Introductionmentioning

confidence: 99%

Adjacent-Channel Compatibility Analysis of International Mobile Telecommunications Downlink and Digital Terrestrial Television Broadcasting Reception in the 470–694 MHz Frequency Band Using Monte Carlo Simulation

Taha,

Vári,

Nagy

2024

Electronics

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This paper delves into the imperative need for coexistence and compatibility in the 470–694 MHz frequency band, as mandated by the World Radiocommunication Conference 2015 (WRC-15) and the WRC-23. It focuses on challenges in the coexistence of Digital Terrestrial Television Broadcasting (DTTB) and International Mobile Telecommunications-2020 (IMT-2020) services in downlink-only mode, particularly in adjacent-channel scenarios. Using Monte Carlo simulations, the study evaluates the probability of interference from IMT base stations with DTTB reception. The analysis thoroughly investigates the impact of the IMT transmitter’s Adjacent Channel Leakage Ratio (ACLR) and the DTTB receiver’s Adjacent-Channel Selectivity (ACS) on the probability of interference. The results demonstrate a significant degradation in the DTTB reception probability at the edge of coverage based on standard assumptions. To address these challenges, this paper provides recommendations for mitigating interference. These include defining enhanced ACLR regulations for IMT base stations, implementing antenna discriminations, providing specialized filters, and establishing national coordination procedures. The research provides valuable insights for informed decision making in spectrum management within the 470–694 MHz band, aiming to facilitate the coexistence of DTTB and IMT-2020 services, in line with international regulations and best practices.

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A Design of Microstrip Low-Pass Filter Using Ground-Plane Coplanar Waveguide (Gcpw)

Chemseddine,

Rahmouna,

Didier

2024

Telecom Rad Eng

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Low-pass filters, high-pass filters, band-pass filters, and band-stop filters are all examples of filters that are passive electronic devices that are used to select, eliminate, or differentiate signals that are located in distinct frequency bands. They can be used in conjunction with a variety of different passive elements and devices, such as is the case with multiplexers and demultiplexers that are utilized in the field of telecommunications. Additionally, they are utilized in active circuits such as amplifiers, mixers, and other similar devices. Microwave filters are designed by using many structures, each of which has ground-plane coplanar waveguide (FGCPW) lines interspersed between them. In this work, we are interested in the proposal, the characterization, the study, and the realization of a microwave low-pass filter in (FGCPW) technology by the Butterworth law. The filter has been achieved by going through the steps of first analytical, then simulation and optimization on the HFSS software. This final filter has a cutoff frequency of 2.5 GHz, an insertion loss of about -0.4734 dB, and a reflection coefficient of about -12.2 dB. The measured results and those simulated with the HFSS software coincide perfectly for the transmission and with a slight offset for the reflection at the input.

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Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Cited by 5 publications

References 2 publications

Co-Channel Compatibility Analysis of IMT Networks and Digital Terrestrial Television Broadcasting in the Frequency Range 470–694 MHz Based on Monte Carlo Simulation

Co-Channel Compatibility Analysis of IMT Networks and Digital Terrestrial Television Broadcasting in the Frequency Range 470–694 MHz Based on Monte Carlo Simulation

Adjacent-Channel Compatibility Analysis of International Mobile Telecommunications Downlink and Digital Terrestrial Television Broadcasting Reception in the 470–694 MHz Frequency Band Using Monte Carlo Simulation

A Design of Microstrip Low-Pass Filter Using Ground-Plane Coplanar Waveguide (Gcpw)

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