UHF,UHF RFID Antenna,RFID antenna manufacturer

Custom Stereo Foldable Headphone

Custom UHF . Antenna

A custom UHF RFID antenna can be tailored to specific requirements, such as size, shape, gain, and radiation pattern. This customization allows the antenna to be optimized for a particular application, environment, or mounting location.

Custom UHF RFID antennas can be designed using various materials, such as printed circuit boards (PCBs), flexible substrates, or specialized antenna materials. They can also be optimized for specific frequency bands, such as 865-868 MHz in Europe or 902-928 MHz in the United States.

Overall, a custom UHF RFID antenna offers flexibility in terms of design, performance, and integration, allowing for improved RFID system performance and adaptability to specific application requirements.

UHF RFID Antenna Frequency Range

Ultra-High Frequency (UHF) RFID systems typically operate in the frequency range of 860 MHz to 960 MHz. However, the exact frequency range can vary depending on the region due to regulatory requirements:

1. North America: 902-928 MHz

2. Europe: 865-868 MHz

3. India: 865-867 MHz

4. Southeast Asia: Varies by country, commonly 920-925 MHz or 866-869 MHz

These frequencies are chosen to balance the trade-offs between read range, data transfer rate, and regulatory constraints. UHF RFID systems are popular because they offer a good balance of range and speed, making them suitable for various applications such as inventory management, asset tracking, and supply chain logistics.

UHF RFID Antenna Gain

UHF RFID Antenna Gain (Simplified)

1. What Is Antenna Gain?
Antenna gain measures how well an antenna focuses radio waves in a certain direction compared to an ideal antenna that radiates equally in all directions. It’s expressed in decibels (dBi).

2. Why It Matters in UHF RFID Systems

Read Range: Higher gain → longer read distance.
Direction: High-gain antennas focus signals, useful when you want a specific reading area.
Signal Strength: Stronger, more reliable tag detection.

3. Types of UHF RFID Antennas

Linear Polarized: For fixed tag orientations, gain ≈ 6–12 dBi.
Circular Polarized: For random tag orientations, gain ≈ 5–9 dBi.

4. Factors Affecting Gain

Design: Shape and size of antenna.
Frequency: Gain changes across frequency range.
Material: Construction materials impact efficiency.
Environment: Obstacles and reflections reduce effective gain.
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Frequency: Antennas are designed for specific frequency ranges, and their gain can vary across these frequencies.

Material: The materials used in the construction of the antenna affect its efficiency and gain.

Practical Considerations

Environment: The presence of obstacles, interference, and reflections in the environment can affect the effective gain.

Regulations: Regulatory bodies (like FCC in the USA) impose limits on the maximum allowable gain and power output to avoid interference with other devices.

Conclusion

Antenna gain is a critical factor in the performance of UHF RFID systems. Selecting the appropriate antenna with the right gain for your specific application can significantly enhance the efficiency and reliability of the RFID system. Always consider the application’s requirements, environmental conditions, and regulatory constraints when choosing an RFID antenna.

UHF RFID Antenna .

UHF RFID antennas can have different polarization types, including linear polarization and circular polarization.

Linear polarization means that the electromagnetic waves radiated by the antenna are oriented in a specific direction. Linearly polarized antennas can have either vertical or horizontal polarization. Vertical polarization means that the electromagnetic waves are radiated in a vertical direction, while horizontal polarization means that the waves are radiated in a horizontal direction.

Circular polarization means that the electromagnetic waves radiated by the antenna rotate in a circular motion. Circularly polarized antennas can have either right-hand circular polarization (RHCP) or left-hand circular polarization (LHCP). RHCP means that the waves rotate in a clockwise direction when viewed from the front of the antenna, while LHCP means that the waves rotate in a counterclockwise direction.

The choice of antenna polarization in UHF RFID systems depends on the specific application requirements, tag orientation, and environmental conditions. Linear polarization can offer higher gain and longer read ranges when tag orientation is controlled, while circular polarization provides more flexibility and reliability in environments with varied tag orientations. Understanding these factors will help in designing an efficient and effective RFID system.

Table Of Contents For This Page

It is not easy to introduce all aspects of Panel antennas, so we have prepared a lot of information on this page for you to delve into. To make sure you can find the information you want quickly, we have prepared this content directory that will jump to the corresponding location when you click on it.

Applications

Hot Products

Cost Analysis

Duration Estimation

Basic Knowledge

Common Pitfalls

Self-Nomination

FAQ

General Applications For UHF RFID Antennas

UHF (Ultra High Frequency) RFID (Radio Frequency Identification) antennas are devices used to transmit and receive radio signals in the UHF frequency range. These antennas are commonly used in various applications that require long-range identification and tracking of objects or people. Some general applications for UHF RFID antennas include inventory management, supply chain management, access control, asset tracking, logistics transportation and retail operations. UHF RFID antennas are designed to be highly efficient and provide reliable communication between RFID readers and tags, making them suitable for a wide range of industries and environments.

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Simplified UHF RFID Antenna Selection Guide

Frequency Range:
Match the antenna to your region (e.g., 902–928 MHz for North America, 865–868 MHz for Europe).
Gain:
- High gain (≈12 dBi): Longer range, narrow beam.
- Low gain (≈9 dBi): Shorter range, wider coverage.
Polarization:
- Linear: For fixed tag orientation.
- Circular: For mixed or unknown tag orientations.
Axial Ratio:
For circular antennas, aim for ≤ 3 dB cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.
Read Range:
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Connector Type:
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Environment:
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1. Frequency Range cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits – Signal Strength: Measured in dBi, higher gain (e.g., 12 dBi) offers longer read range but narrower beamwidth. Lower gain (e.g., 9 dBi) provides wider coverage but shorter range.

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits – Orientation:

– Linear: Best for consistent tag orientation.

– Circular: Ideal for unpredictable tag orientations, ensuring reliable reads.

4. Axial Ratio – Polarization Quality: For circularly polarized antennas, a lower axial ratio (close to 1 dB) ensures better performance. Aim for 3 dB or lower.

5. Read Range – Distance: Choose an antenna that meets your required read range, influenced by power, gain, tag sensitivity, and environment.

6. Connector Type – Compatibility: Match the antenna connector type (e.g., SMA, TNC, N-Type) with your RFID reader’s connector, considering gender and polarity.

7. Mounting Type – Installation: Select based on your environment:

– Wall-Mounted: Fixed installations.

– Ceiling-Mounted: Overhead setups.

– Pole-Mounted: Outdoor/high-traffic areas.

– Embedded: Integrated into devices.

8. Environmental Considerations – Durability: Check the IP rating for dust/water resistance and ensure it operates within your temperature range.

9. Size and Form Factor – Space Constraints: Ensure the antenna fits within your installation area, choosing compact or larger antennas as needed.

Model: STQ9G4C

865/915MHz 4dBi Circular Quadrifilar Helix Antenna

The quadrifilar helix antenna is a versatile and efficient antenna that is well-suited for a variety of applications requiring circular polarization and high gain. The compact and lightweight design make it ideal for portable readers and scanners.

Model: STR9G5C

865/915MHz 5.5dBi Circular Polarized RFID Antenna

The antenna operates over frequency ranges suitable for both FCC (902-928 MHz) and ETSI (865-868 MHz) standards. It is proven in a diverse range of markets and applications including retail, file management, library management, medicine-cabinet management, and Medical & Pharma applications, etc.

Model: STR9G8C

865/915MHz 8dBi Circular Polarized RFID Antenna

The antenna operates over frequency ranges suitable for both FCC (902-928 MHz) and ETSI (865-868 MHz) standards. It is proven in a diverse range of markets and applications including Access Control, Inventory Management, Loss Prevention, Supply Chain Management, Transportation and Logistics, etc. They can be mounted on walls, ceilings, or poles, depending on the specific application requirements.

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Low VSWR and Low Axial Ratio Across Entire Operating Range
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The antenna operates over frequency ranges suitable for both FCC (902-928 MHz) and ETSI (865-868 MHz) standards. It is proven in a diverse range of markets and applications including Access Control, Inventory Management, Loss Prevention, Supply Chain Management, Transportation and Logistics, etc. They can be mounted on walls, ceilings, or poles, depending on the specific application requirements.

Model: cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits

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Low VSWR and Low Axial Ratio Across Entire Operating Range
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Model: ST-B-RF-01

Model: ST-B-RF-02

Universal Die-casting Aluminum Bracket For The Enclosure

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One of the key features of the die-casting aluminum bracket is its robust construction. Made from high-quality aluminum alloy, it offers exceptional strength and durability, ensuring that the mounted equipment remains stable and secure even in harsh weather conditions.

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$10,000

Antenna arrays 1600 Units and $6.35 for each $10,000

4 each linear element, one 860-960MHz antenna combiner and feeding network, with a N-female connector mounted on the backplate.

$10,000

Reflector/Backplate 1600 PCS and $9.58 for each $10,000

Size: 440x440mm, Material: 2.0mm 5052 aluminum alloy; Surface finish: White paint or wire brush

$10,000

Labor cost 1600 PCS and $4.93 for each $10,000

It includes the welding of feeding network & connector, VSWR test, and assembly of antenna radome, array and backplate.

$10,000

Mounting bracket 1600 Units and $4.09 for each $1,000

Steel with Dacromet finish, including bolts, nuts and washers

$1,000

Pigtail 1600 PCS and US$ 3.50 for each $4,300

N-male=> 3m RG58 => RP TNC Plug with caps

$4,300

Product box and packaging foams 1600 Units and US$2.68 for each $4,300

Product box: 60x49x12mm, 3 layers, K=A; Multiple carton :63x51x61cm, 5 layers, K=A, with protection foams

$4,300

Towing & customs clearance fee and US$915.00 for each bill

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From our factory in Nanhai, Foshan to Yantian port of Shenzhen, one 40HQ

$4,300

Ocean freight of one 40HQ and US$5,000 for each $4,300

Shipping from Shenzhen, China to San Francisco, USA. The pricing was based on May 11th.2024.

$4,300

The Process Flow & Duration Estimation

Please note that the final lead-time depends on the customized service you require, electrical & mechanical specifications , the raw material types, product surface finish types, and packaging, etc. Take an example of customizing a 868MHz 6dBi circular RFID antenna:

Step 1: HFSS Simulation Test (1-2 days for single band )

HFSS (High Frequency Structure Simulator) is a powerful electromagnetic simulation software used for antenna design. It allows engineers to analyze and optimize antenna performance by simulating electromagnetic fields and predicting radiation patterns of frequency range, gain, polarization, S11, half-power beamwidth and other important parameters.

For dual band or multiple bands, the lead-time is range from two week to four weeks.

Step 2: Optimized design and generate CAD drawings (within 1 day)

To ensure that the HFSS design is thoroughly verified and optimized, we will take the necessary steps to review all parameters and performance metrics. Once the design is confirmed, we will proceed with generating the CAD drawing for the prototype and sample. This process, including verification, optimization, and CAD drawing generation, will be completed within two working days.

Step 3: Prepare the material for the prototypes (5-7 days)

On average, it takes PCB suppliers 5-7 working days to prepare and manufacture the antenna array materials, such as FR4 or F4B. This time frame includes the domestic shipping time as well.

Step 4: Prototype testing (1-2 days)

The antenna prototype is tested in an anechoic chamber to measure and analyze the electromagnetic radiation pattern. Engineer can accurately measure and analyze the antenna’s performance, identify any design flaws, and optimize the antenna’s radiation characteristics for specific applications.

Step 5: Shipping to the USA(4-5 days)

Normally, we will arrange the shipment by DHL since it’s the fastest channel for prorotypes. There is no big difference on the freight cost compared with FedEx/UPS.

We can also use a special channel if it’s not urgent and the packaging size is big. The import tariff and customs clearance can be included. This can save you a lot of money.

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Once the prototypes are received and tested in a real-world conditions and get approved. It’s suggested to place a small quantity trial order. This way, any potential problems or defects can be identified and resolved before moving forward with mass production.

Step 7: Mass production (15-30 days)

Once the trial order has been successfully completed without any issues, we can proceed with mass production of the new antenna product. What we need to do next is to reduce the cost without compromise on the product quality and performance. It’s included but not limited to optimizing the product performance & structure, improving production efficiency, and source new suppliers, etc.

Want to know how to compress lead-time of mass production?

Compressing lead times for mass production of Panel antenna is crucial for businesses looking to meet customer demands and stay competitive in the market. By implementing strategies such as optimizing production processes, streamlining supply chain management, and utilizing advanced manufacturing technologies, companies can significantly reduce the time it takes to produce panel antennas and improve overall operational efficiency.

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We have crafted the following articles to provide you with a comprehensive understanding of the functionality, operation, and applications of UHF RFID antennas. These articles includes but are not limited to the RFID readers, UHF RFID antenna frequency, design polarization, read range, mounting options, antenna type selections, etc.

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cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits Common Pitfalls When Purchasing from China

When purchasing UHF RFID antennas from China, there are several common pitfalls that buyers should be aware of. These pitfalls include poor quality control, misleading specifications, and lack of technical support, etc.

One of the main reasons these pitfalls occur is due to the large number of suppliers in China. With so many options available, it can be difficult to find a reliable and trustworthy supplier. Some suppliers may not have the necessary experience or expertise to produce high-quality antennas, leading to poor performance and durability issues. Many Chinese manufacturers prioritize quantity over quality, leading to a higher likelihood of receiving a defective or subpar product. This can result in antennas that do not perform as expected or have a short lifespan.

Quality issues
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Misleading Specifications:
Some suppliers exaggerate antenna performance, and real tests may show lower results.

Limited Technical Support:
Many vendors offer little help with setup or troubleshooting, leaving buyers to solve problems themselves.

Communication Issues:
Language and cultural differences can cause misunderstandings and delays during purchase.

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4. Trust and reliability: We have a strong reputation for being trustworthy and reliable. Our customers trust us to deliver on our promises and to consistently provide exceptional products and services.

5. Long-term partnerships: We believe in building long-term relationships with our customers. We are not just interested in making a quick sale; we want to be a trusted partner that our customers can rely on for years to come.

In summary, we offer quality, expertise, excellent customer service, trust and reliability, and long-term partnerships.

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Below, you will find a list of 20 frequently asked questions along with their concise answers. We have spent 15 years supplying antennas and serving customers worldwide, which has allowed us to accumulate a wealth of knowledge and experience. If you have any additional questions, please feel free to reach out to us directly.

1. What is a UHF RFID antenna?

A UHF RFID antenna is a component of an RFID system that transmits and receives radio frequency signals to and from RFID tags within the UHF (Ultra High Frequency) range, typically between 300 MHz and 3 GHz.

2. What frequency range do UHF RFID antennas operate in?

UHF RFID antennas generally operate in the frequency range of 860 to 960 MHz, with regional variations such as 902-928 MHz in North America and 865-868 MHz in Europe.

3. What are the main types of UHF RFID antennas?

The main types of UHF RFID antennas include linear polarized antennas, circular polarized antennas, and near-field antennas.

4. What is the difference between linear and circular polarized antennas?

Linear polarized antennas emit waves in a single plane, making them suitable for environments where the tag orientation is predictable. Circular polarized antennas emit waves in a circular pattern, allowing them to read tags regardless of orientation.

5. What are near-field UHF RFID antennas used for?

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cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

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cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

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cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits

cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits.

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Longer cables can introduce signal loss, reducing the effective read range and performance of the antenna. High-quality, low-loss cables are recommended for longer runs.

17. Are there any regulations governing the use of UHF RFID antennas?

Yes, UHF RFID antennas must comply with regional regulatory standards, such as FCC regulations in the United States and ETSI standards in Europe, which govern frequency usage and power output.

18. What is the typical power output of a UHF RFID antenna?

The power output is typically controlled by the RFID reader and can range from a few milliwatts to several watts, depending on the application and regulatory limits.

19. How do you test the performance of a UHF RFID antenna?

Performance can be tested using an RFID reader and software to measure read range, read accuracy, and signal strength. Field tests in the actual deployment environment are also important.

20. Can UHF RFID antennas be used for both reading and writing to tags?

Yes, UHF RFID antennas can both read data from and write data to RFID tags, allowing for versatile applications such as inventory updates and access control.

Available Model Options

“>Download

Model	Frequency (MHz)	Gain (dBi)	Polarization	VSWR	HW/VW (°)	Connector	Dimensions （mm）	Datasheet
STQ8G4C	856-858	4	Circular	≤1.3	110/110	N-female	60x60x10	Download
STR8G5C	865-868	5.5	Circular	≤1.3	100/100	N-female	134x134x21	Download
STR8G8L	865-868	8	Linear	≤1.3	70/70	N-female	258x258x40	Download
STR8G9L-PRO	865-868	9	Linear	≤1.3	75/65	N-female	300x190x45	Download
STR8G8C	865-868	8	Circular	≤1.3	70/70	N-female	258x258x40	Download
STR8G9C-PRO	865-868	9	Circular	≤1.3	65/65	N-female	260x260x30	Download
STR8G11C-PRO	865-868	11	Circular	≤1.3	72/35	N-female	605x305x20	Download
STR8G12C	865-868	12	Circular	≤1.3	40/40	N-female	450x450x40	Download
STR8G12L	865-868	12	Linear	≤1.3	40/40	N-female	450x450x40	Download
STQ9G4C	902-928	4	Circular	≤1.3	110/110	N-female	60x60x10	Download
STR9G5C	902-928	5.5	Circular	≤1.3	100/100	N-female	134x134x21	Download
STR9G8L	902-928	8	Linear	≤1.3	70/70	N-female	258x258x40	Download
STR9G9L-PRO	902-928	9	Linear	≤1.3	75/65	N-female	300x190x45	Download
STR9G8C	902-928	8	Circular	≤1.3	70/60	N-female	258x258x40	Download
STR9G9C-PRO	902-928	9	Circular	≤1.3	65/65	N-female	260x260x30	Download
cURL Too many subrequests by single Worker invocation. To configure this limit, refer to https://developers.cloudflare.com/workers/wrangler/configuration/#limits	902-928	11	Circular	≤1.3	72/35	N-female	605x305x20	Download
STR9G12L	902-928	12	Linear	≤1.3	40/40	N-female	450x450x40	Download
STR9G12C	902-928	12	Circular	≤1.3	40/40	N-female	450x450x40	Download
STR9G15CC	902-928	15	Circular	≤1.5	71/22	SMA-female	1600x188x21	Download
STR89G9C	860-960	9	Circular	≤1.3	70/60	N-female	260x260x30	Download

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