হেলিকাল ব্যান্ডপাস ফিল্টার ফ্রিকোয়েন্সি আরএফ কাস্টম ফ্রিকোয়েন্সি বিকল্পগুলি 340MHz

হেলিকাল ব্যান্ডপাস ফিল্টার ফ্রিকোয়েন্সি আরএফ কাস্টম ফ্রিকোয়েন্সি বিকল্পগুলি 340MHz

Helical filters are a critical component in modern RF and microwave systems, providing selective frequency filtering with excellent performance in terms of insertion loss, প্রত্যাখ্যান, এবং স্থিতিশীলতা. দ্য Helical Bandpass Filter (336MHz–344MHz) is designed for high-performance applications where precise frequency control and signal purity are essential. With its robust design, কম ক্ষতি, and high rejection characteristics, this filter is widely used in communication systems, broadcasting equipment, military radio, and various wireless transmission solutions.

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পণ্য ওভারভিউ

দ্য Helical Bandpass Filter is a compact and reliable RF filter specifically tuned to operate within the 336MHz to 344MHz frequency range. It is engineered to allow only the desired signals within this band to pass while effectively attenuating unwanted frequencies outside the range. Built with high-quality materials and advanced helical resonator technology, this filter delivers superior electrical performance in demanding environments.

This model offers flexibility for customization, as frequencies can be adjusted according to customer requirements. Whether for OEM integration, system upgrades, or specialized communication equipment, the filter provides an ideal solution to ensure stable, পরিষ্কার, এবং হস্তক্ষেপ-মুক্ত সংকেত সংক্রমণ.

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মূল বৈশিষ্ট্য

Standard Parameters

পদ	সবিস্তার বিবরণী
কম্পাংক সীমা (Passband)	336 মেগাহার্টজ - 344 মেগাহার্টজ
Other Frequency Options	Customizable to customer demand
সন্নিবেশ ক্ষতি	≤ 1.2 ডিবি
Passband Ripple	≤ 0.5 ডিবি
রিটার্ন ক্ষতি	≥ 15 ডিবি
আউট-অফ-ব্যান্ড প্রত্যাখ্যান	≥ 40 dB @ Fo ± 50 মেগাহার্টজ
পাওয়ার হ্যান্ডলিং	≤ 10 ওয়াট
impedance	50 উহু
সংযোগকারী প্রকার	N-KFD (আরএফ সংযোগকারী)
মডিউল আকার (মিমি)	89 × 20 × 32 (excluding joints)

Customizable Parameters

পদ	সবিস্তার বিবরণী (337–343 MHz Band)	সবিস্তার বিবরণী (520–524 MHz Band)
অপারেটিং ফ্রিকোয়েন্সি	337–343 MHz	520–524 MHz
সন্নিবেশ ক্ষতি	≤ 2.4 ডিবি	≤ 1.2 ডিবি
রিটার্ন ক্ষতি	≥ 15 ডিবি	≥ 15 ডিবি
VSWR	≤ 1.3	≤ 1.3
আউট-অফ-ব্যান্ড প্রত্যাখ্যান	≥ 20 dB @ 328 MHz≥ 20 dB @ 352 মেগাহার্টজ	≥ 40 dB @ 460 MHz≥ 40 dB @ 590 মেগাহার্টজ
পাওয়ার হ্যান্ডলিং	10 ওয়াট	10 ওয়াট
সংযোগকারী	এন-পুরুষ / এন-মহিলা	এন-কে / এন-জে
মাত্রা	101 × 26 × 22 মিমি (including bracket)	89 × 32 × 20 মিমি

Helical Bandpass Filter Frequency RF Custom Frequency dimension

520-522-524MHz Helical Bandpass Filter

337-340-343MHz Helical Bandpass Filter

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Detailed Feature Breakdown

1. Frequency Selectivity

The filter has been optimized to operate in the 336–344 MHz band, providing precise bandpass characteristics. This narrowband design ensures that only signals within this range are passed, making it particularly useful in communication links that require high spectral efficiency.

2. কম সন্নিবেশ ক্ষতি

With an insertion loss of ≤1.2 dB, this filter ensures that the signal strength within the passband is preserved, minimizing degradation during transmission. This low loss makes the product suitable for sensitive receiver front ends, where every decibel of signal strength is critical.

3. Stable Passband Performance

দ্য passband ripple of ≤0.5 dB guarantees a smooth and uniform transmission across the entire band. This reduces distortion and maintains the integrity of transmitted signals, which is vital for applications requiring high signal fidelity such as digital communication and video transmission.

4. High Out-of-Band Rejection

The filter achieves ≥40 dB rejection at Fo ± 50 মেগাহার্টজ, ensuring effective suppression of nearby interference sources. This level of rejection is essential in dense RF environments, preventing adjacent channel interference and enhancing overall system performance.

5. Return Loss and Impedance Matching

একটি return loss ≥15 dB confirms excellent impedance matching, minimizing signal reflection and maximizing power transfer. With a standard 50 Ω প্রতিবন্ধকতা, the filter integrates seamlessly with most RF systems, ট্রান্সমিটার, এবং রিসিভার.

6. Power Handling Capability

Designed with durability in mind, the filter supports a power rating of ≤10W, making it suitable for both low and medium power RF systems. This ensures reliable performance even in transmission applications that demand higher signal strength.

7. Mechanical Design and Connectors

The filter is built in a compact housing (89 × 20 × 32 মিমি, সংযোগকারী বাদে) for easy integration into space-constrained systems. এটি একটি বৈশিষ্ট্য N-KFD connector, known for its durability and reliable RF performance, ensuring secure connectivity.

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অ্যাপ্লিকেশন

দ্য Helical Bandpass Filter (336–344MHz) finds broad applications across multiple industries:

1. Wireless Communication Systems

   • Used in base stations, পুনরাবৃত্তি, and transceivers to filter out unwanted signals.

   • Ensures clear and interference-free communication in mobile and fixed networks.

2. সামরিক এবং প্রতিরক্ষা

   • Integral for secure and robust tactical communication systems.

   • Provides precise channel separation in radio communications during missions.

3. জননিরাপত্তা নেটওয়ার্ক

   • Supports police, আগুন, and emergency response communication systems.

   • Guarantees reliable communication without interference, especially in crowded spectrum environments.

4. Broadcasting Equipment

   • Used in FM and VHF broadcasting stations.

   • Improves signal clarity and transmission quality for both audio and video signals.

5. Test and Measurement Systems

   • Incorporated into RF testing equipment for accurate signal analysis.

   • Filters unwanted frequencies to ensure reliable test measurements.

6. UAVs and Drone Applications

   • Helps maintain clean downlink and uplink signals for video and telemetry systems.

   • Supports COFDM-based wireless image transmission systems where stable signals are essential.

7. Industrial and Research Applications

   • Utilized in laboratory RF setups and industrial wireless monitoring systems.

   • Supports research experiments requiring precision filtering at VHF frequencies.

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Advantages of Helical Filter Design

The helical filter architecture provides several distinct advantages compared to traditional LC or cavity filters:

1. কম্প্যাক্ট আকার: Despite its high performance, the filter is physically small, making it suitable for modern compact devices.

2. High Q-Factor: Helical resonators offer excellent selectivity and sharp band edges, enhancing overall filter performance.

3. Mechanical Robustness: The design ensures stable performance even under vibration or temperature fluctuations.

4. স্কেলাবিলিটি: Frequencies can be easily tailored to customer requirements without significant redesign.

5. Superior Rejection: Provides higher out-of-band rejection compared to many alternative filter technologies.

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কাস্টমাইজেশন বিকল্প

Recognizing that every application has unique frequency requirements, আমরা অফার customizable designs. While the standard model covers the 336–344 MHz band, the filter can be tuned to other frequency bands upon request. Engineers can specify:

• কেন্দ্র ফ্রিকোয়েন্সি

• ব্যান্ডউইথ

• Connector types (এন-টাইপ, উচ্চ বিদ্যালয়, প্রভৃতি)

• Housing size constraints

This flexibility makes the filter highly adaptable across industries and project-specific needs.

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Reliability and Quality Assurance

Each Helical Bandpass Filter undergoes rigorous quality control and performance testing to ensure compliance with specifications. Parameters such as insertion loss, return loss, and rejection are measured with high-precision network analyzers. The housing is manufactured from durable materials to withstand long-term use in both laboratory and field conditions.

উপরন্তু, the product is designed to comply with international RF component standards, ensuring compatibility with global markets.

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Integration and Installation

The filter’s N-KFD connectors make installation simple and secure, allowing fast integration into existing systems. এটি 50 Ω প্রতিবন্ধকতা ensures seamless compatibility with most RF transmission and reception equipment. Due to its small form factor, the filter can be installed in both portable and fixed communication setups without occupying significant space.

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উদাহরণ ব্যবহার কেস

Consider a public safety communication network operating around 340 মেগাহার্টজ. এমন দৃশ্যে, multiple agencies share nearby frequency bands, creating the risk of interference. By incorporating this 336–344 MHz Helical Bandpass Filter into the system, engineers can ensure that only the intended signals are received while rejecting out-of-band interference. This results in improved clarity, reduced noise, and enhanced reliability for mission-critical communications.

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উপসংহার

দ্য Helical Bandpass Filter (336MHz–344MHz) is a high-performance RF component that delivers precision filtering, কম সন্নিবেশ ক্ষতি, এবং চমৎকার আউট অফ ব্যান্ড প্রত্যাখ্যান. এর কমপ্যাক্ট ডিজাইন, customizable frequency options, and robust construction make it suitable for a wide variety of applications, from defense communication to UAV systems. By ensuring clean and stable signals, this filter significantly enhances the performance of modern wireless communication systems.

Whether deployed in broadcasting, কৌশলগত যোগাযোগ, বা শিল্প পর্যবেক্ষণ, this filter provides the reliability and efficiency required in today’s demanding RF environments. With customization options available, it is a versatile solution that can be tailored to meet the unique requirements of any project.

অনবরত জিজ্ঞাসিত প্রশ্ন

প্রশ্নাবলি: What frequency at edge?

উত্তর: 330-350মেগাহার্টজ. We also offer customization options. To avoid fluctuations caused by temperature changes, the frequency range is occasionally broadened.

প্রশ্ন: What will be the rejection at ±12 MHz from the center frequency of the custom helical filter?

উত্তর: According to software simulation results, the rejection (suppression) at ±12 MHz offset is approximately 10 ডিবি থেকে 12 ডিবি.

প্রশ্ন: What is the maximum power handling capacity of the helical filter?

উত্তর: The standard helical filter can handle up to 5 W CW (continuous wave) ক্ষমতা. This rating meets the requirements of most COFDM and FPV video transmission systems.

প্রশ্ন: Can the helical filter support higher power levels, যেমন 10 ওয়াট?

উত্তর: হাঁ. একটি custom high-power version অনুরোধের ভিত্তিতে উপলব্ধ. With larger housing, enhanced thermal design, or silver-plated conductors, the filter can handle up to 10 W CW.

প্রশ্ন: How should I choose between 5 W and 10 W versions?

উত্তর: If your transmitter output power is নীচে 5 ওয়াট, the standard model is sufficient. For transmitters with output power close to or above 5 ওয়াট, we recommend choosing the 10 W custom version for safe operation and longer lifespan.

প্রশ্ন: Does higher power handling affect the filter’s performance?

উত্তর: No significant difference in filtering characteristics. যাহোক, high-power filters are slightly larger in size and may have lower insertion loss due to improved conductor quality.

প্রশ্ন: Can you customize the filter according to my system power and frequency?

উত্তর: হাঁ, উভয়ই কেন্দ্র ফ্রিকোয়েন্সি এবং power handling কাস্টমাইজ করা যেতে পারে. Please provide your required frequency band and output power so we can design a suitable model.

প্রশ্ন: What is the rejection at 377 MHz and insertion loss at 340 মেগাহার্টজ?

উত্তর: Please refer to the test results below for detailed measurement data.

প্রশ্ন: Loss is 2.2 db at 340 mhz right?

উত্তর: If you want to minimize insertion loss, the suppression will worsen. The filter has been designed with an additional cavity, which slightly increases the insertion loss but improves the out-of-band rejection performance.