RFID (Radio-Frequency Identification) technology is widely used for tracking and identification purposes in various industries. However, sometimes there may be concerns about the RFID reading distance problem and the effectiveness of the technology.

This may cause some trouble to your business, but through the detailed explanation in this article, you will understand what to do when encountering identification problems. Of course, if you don’t want to spend so much time, you can also directly hand over this matter to Newbega to solve it, but if you want to have a comprehensive understanding, Here are some potential solutions to enhance RFID reading distance:

Table of Contents

Choose the Right RFID Chip and Reader

Different RFID systems have different recognition distances. In the market, we usually use three types of chips: LF, HF, and UHF. If you want to know more about these three types of chips, we have seen them in a previous article. You can click the link to check it out!

rfid chip coil

If you are short of time, you can also have a brief understanding through the following introduction. The following are the introductions of several common RFID chips and their reading distances:

Low-Frequency RFID chip:

LF RFID chips have long wavelength and good penetrating ability, which can even penetrate metal. The reading distance is mainly based on the performance of the card reader. The greater the energy emitted by the card reader, the longer the reading distance. EM4305 cards are often used in parking lot management systems, and the farthest reading distance can reach more than 1 meter.

Here are some common low frequency chip names: EM4102, EM4200, T5577, HITAG 1, HITAG 2, HITAG S, Q5/T5557, ATA5577, TK4100, TK4102

High-Frequency RFID chip:

Mifare Classic series (such as Mifare 1K and Mifare 4K): The reading distance is generally 2-10 cm, widely used in bus cards, access control cards, hotel door lock cards and other fields.

NFC chip (such as NXP NTAG series): The reading distance is 2-10 cm, used for applications such as near-field communication, mobile payment and smart labels.

Ultra-High-Frequency RFID chip:

Antennas in the UHF band typically have higher gain and narrower beamwidths. Gain is the ability of an antenna to concentrate radiated energy in a certain direction, and a narrower beamwidth makes the energy more concentrated. The performance characteristics of this antenna allow the reader to focus energy more precisely on the target, further increasing the read range.

Impinj Monza series: The reading distance can reach more than 10 meters, which is suitable for logistics, inventory management and retail fields.

Alien Higgs series: The reading distance is usually between 5-10 meters, widely used in vehicle identification, logistics tracking and warehouse management and other scenarios.

Optimize Antenna Placement

The antenna placement of the RFID chip plays a crucial role in achieving the maximum identification distance. Proper adjustment and optimization of antenna placement can significantly increase the read range of an RFID system. Here are some ways to optimize antenna placement.

rfid reading distance

Distance and angle:

Try to place the RFID antenna within an appropriate distance from the target object, and pay attention to the adjustment of the angle. When adjusting the antenna angle, you can try different angles and heights to get the best recognition effect. For example, place the antenna in a vertical position so that it forms the best RF link in the vertical direction with the tag. This will greatly increase rfid reader distance too.

Number and layout of antennas:

Consider increasing the number or layout of antennas according to application requirements and environmental conditions. By using multiple antennas, it is possible to cover a larger area and increase the overall read range. For example, in a large warehouse, multiple antennas are used to cover different areas for comprehensive item identification.

Antenna direction:

Select the appropriate antenna direction according to the application requirements. According to the working frequency and application environment of the RFID system, the antenna can be selected as directional or omnidirectional. Directional antennas can be used in applications that require specific direction identification, while omnidirectional antennas are suitable for occasions that do not require a fixed direction. For example, omnidirectional antennas are placed around supermarket checkouts to quickly read tags on items in shopping carts.

Eliminate Interference:

When deploying antennas, minimize interference from other electromagnetic devices or metal objects. Keep the antenna away from devices that may cause interference, and keep metal objects away from the antenna. Eliminating these sources of interference is critical to increasing the read range of an RFID system.

Optimizing the placement of the RFID antenna through the above methods to increase the recognition distance, however, if necessary, make appropriate adjustments and optimizations according to specific applications and environments. Work with RFID technology suppliers and experts to customize the best antenna placement for your specific needs and requirements.

Implement RFID Signal Amplifiers

An RFID signal amplifier is a device used to enhance signal transmission in an RFID system. It is usually used with RFID readers and antennas, and is designed to improve the strength and quality of the signal, so as to achieve longer identification distance and more reliable data transmission.

A signal amplifier in an RFID system enhances the RFID signal by increasing the power and gain of the signal. It can amplify the signal sent by the reader so that it can pass through obstacles, reach farther targets, or achieve reliable identification in complex environments. Amplifiers can increase the read range of a system and increase signal robustness in the presence of interference and noise.

The working principle of the RFID signal amplifier is usually to amplify the received signal and compensate for the loss of signal quality during transmission. It can enhance the reading performance of the system by adjusting transmit power, increasing signal gain, eliminating spurious signals and providing a stronger reader-antenna connection.

However, the cost of adding equipment on the original basis is too high, and it also makes RFID equipment take up more space. Here are some ways that don’t require additional purchases of new equipment.

Upgrade Firmware and Software

With the continuous development of RFID technology, the updated firmware version can improve the recognition distance and overall performance, and the recognition distance has also been significantly improved. The newer version of firmware and software enhances the reading distance by optimizing signal processing algorithms and improving power transmission.

long distance rfid reader

So regularly check the RFID device manufacturer’s website to see if new firmware and software updates are available, and follow the update instructions to upgrade. Upgrading firmware and software is one of the key steps in ensuring that your RFID system remains in top condition, with the latest features and performance.

At the same time, you can also take this opportunity to check out whether there are any abnormalities in the system. Sometimes the unrecognizable situation is not necessarily due to the distance, it may also be that the system is encrypted, so it cannot be read by default – it is also very important to find a suitable RFID reader! You can click the “envelope” icon on the right to communicate with us, and we will have professionals to answer for you.

Minimize Interference

Interference from other electromagnetic devices or metal objects may hinder the identification of the RFID chip. When you find that the reading is not smooth, you should consider whether there is shielding equipment in the surrounding environment; some large mechanical equipment, electrical products or metal structures may emit electromagnetic radiation and generate interference signals, thereby affecting the data transmission between the RFID chip and the reader.

Like the currently popular shielded cards or shielded wallets. The essential purpose is to prevent criminals from reading information without contact. If you have an RFID product that you want to protect, you can also use a shielded wallet or a shielded card to block the transmission of information. You can click on the links to learn about these products.

After eliminating these interference sources, the information transmission distance will be improved. In addition, the human body is also a source of interference, which needs attention.

Conclusion of rfid reading distance

All in all, through this article, you can know how to increase the reading distance of rfid devices, and have a more direct means of dealing with difficulties in reading information. This is a better solution to the sudden failure of the rfid device.

Of course, if you want to solve rfid reader distance problem once and for all, a better way is to choose to buy high-quality products at a reasonable price. By reading our previous blogs, you can learn more about RFID cards and corresponding products.

However, if you have something else important to deal with and are not allowed to spend much time studying these knowledge, a good supplier like Newbega can help you reach your aim, too. Why not give a chance to us to help you? Tap the “Inquire Now” button below to start our cooperation now~

Share to:

These are original articles, and reproductions are prohibited without authorization.