Body Worn Camera 4G/5G Antenna

Shenzhen Qianmu Communication Technology Co., Ltd. is a domestic R&D and manufacturing source factory for Body Worn Camera 4G/5G Antennas.

We have developed an in-house FPC wideband Sub6G built-in antenna, compatible with 4G LTE and mainstream domestic and international 5G Sub6G frequency bands. The antenna has undergone specialized performance optimization to address the challenges of compact device space, metal shielding, battery interference, signal loss due to human body wear, and harsh field operation conditions.

The antenna uses reliable PI flexible substrate and is mounted with industrial adhesive, making it suitable for compact device structures. All products undergo full OTA simulation testing in anechoic chambers to replicate real-world operational environments. VNA and OTA test records are archived by production batch, and inspection reports can be provided upon request.

Professional technical definition

Our Body Worn Camera 4G/5G Antenna is a broadband PIFA FPC flexible built-in Sub6G antenna. It supports LTE bands B1/B3/B5/B8/B20/B38/B40 and mainstream 5G Sub6G bands N41/N78/N79. The antenna uses a vibration-resistant, salt-spray-resistant, highly bendable PI film substrate, combined with industrial-grade high-temperature double-sided adhesive and U.FL/IPEX RF feedline, making it ideal for internal installation in body-worn cameras.

Unlike conventional IoT FPC antennas, the design phase incorporates full-system 3D simulation, including the metal casing, lithium battery, camera bracket, motherboard shield cover, and human body phantom model into the simulation environment.

Pre-matched with 50Ω impedance at the factory, and simultaneously subjected to drop, temperature cycling, salt spray, and humidity reliability testing. This reduces customer system integration workload and shortens the development cycle for police hardware projects.

Complete Working Principle of Antenna

The entire antenna consists of an FPC radiating conductor, an industrial adhesive backing layer, a U.FL coaxial feeder, and a mainboard RF matching network, enabling bidirectional conversion of high-frequency electromagnetic waves to achieve 4G/5G cellular signal transmission and reception.

During transmission, the recorder's communication module converts video streams, SOS alerts, and location data into high-frequency electrical signals, which are transmitted via coaxial cable to the FPC resonant structure. These signals are then converted into 4G/5G electromagnetic waves for external radiation, sending evidence information to the base station.

During reception, the antenna captures electromagnetic waves from the base station and converts them into electrical signals, which are then transmitted back to the module to complete the scheduling command and remote parameter reception.

To compensate for RF loss caused by wearing on the human back, performance is enhanced through simulation in an anechoic chamber using a human body phantom model, resulting in a 22.8 dB improvement in TIS receive sensitivity compared to conventional FPC antennas. Under simulated wearing conditions, the efficiency of a standard antenna for LTE B8 is only 40.46%, while Qianmu's antenna achieves ≥52% for LTE low frequency and ≥47% for 5G N78. Each batch undergoes sampling and retesting with VNA, with test curves and production records archived for customer verification.

Compatible devices and accessories

Compatible with end devices

1. Public Security and Traffic Police 4G/5G High-Definition Law Enforcement Body Camera

2. Body camera for urban management, road administration, and fire department audiovisual evidence collection

3. Explosion-proof Intrinsically Safe Law Enforcement Recorder for Chemical and Mining Industries

4. Power Inspection Single Soldier Recording Terminal

5. Overseas Export 4G/5G Single Soldier Law Enforcement Device

Compatible communication module

- 4G LTE Cat.1 / Cat.4 communication module 5G Sub-6GHz domestic/imported communication module 4G+5G+WiFi multi-mode integrated communication module

Factory-supplied materials for production

U. FL/IPEX coaxial cables of various lengths, reinforcement steel plates, and high-temperature, salt-resistant industrial adhesive backing. Customizable cable length and connector specifications based on the motherboard design to minimize secondary processing for customers.

Technical Specifications

Antenna Procurement and Selection Guide

1. Focus on real-world measurement data from complete devices worn on the body, rather than relying solely on free-space parameters. Typical manufacturer datasheets provide measurements taken on bare boards; performance significantly degrades once installed in device housings and worn. When purchasing, always request full-system VNA/OTA test reports and do not rely solely on theoretical specifications.

2. Prioritize selecting a source factory with experience in mass-producing single-soldier law enforcement equipment. The challenges of single-soldier devices lie in dealing with interference from metal housings and batteries, human body wear, and harsh environments. Factories with prior project experience can provide early structural and PCB recommendations, reducing the need for mold modifications and rework.

3. Differentiate between domestic and international frequency bands, and clearly define reliability testing standards. For domestic projects, confirm LTE B1/B3/B5/B8/B20 and 5G N41/N78/N79; for export projects, confirm the corresponding overseas frequency bands. Require completion of drop, salt spray, and high/low temperature sampling tests. Consumer-grade antennas cannot meet the requirements for police field operations.

4. Value RF technical services and avoid mere price comparison. Project development often encounters interference, frequency deviation, and degraded wearing performance. Intermediaries lack RF technical capabilities; prioritize manufacturers that can provide layout recommendations and assist in troubleshooting complete system failures.

Why Choose Shenzhen Qianmu Communications

1. Direct supply from the source factory with no middleman markups. In-house production line handles FPC cutting, reinforcement, adhesive backing, and full electrical inspection. Competitive pricing for bulk orders, long-term framework supply supported, suitable for police procurement bidding projects.

2. Specializing in individual soldier equipment, we have been deeply involved in early-stage R&D and possess extensive experience in mass production and deployment of various body-worn cameras and single-soldier terminals. For new projects, we can receive 3D designs, provide antenna layout and clearance constraint solutions, avoid design flaws, and reduce mold modification costs.

3. Flexible OEM/ODM customization supports irregular FPC cutting, feeder length, connector specifications, and frequency band fine-tuning; standard sample delivery within 35 working days.

4. Complete foreign trade support capabilities [Image placeholder: Collection of certification documents (CE, FCC, RoHS, ISO)] The company holds independent import and export rights and possesses full sets of qualifications. We can provide English technical specifications and test reports, support FOB Shenzhen trade terms, and connect with overseas security solution providers and buyers.

5. End-to-end technical after-sales support: In case of 4G/5G signal anomalies in the entire device, RF engineers will assist in identifying the root cause (antenna, structure, or module) without hastily attributing the issue to antenna problems. Continuous technical collaboration is provided throughout sample testing, pilot production, and mass production stages.

FAQ

Q1: Can the Body Worn Camera 4G/5G antenna be shared with the Wi-Fi module?

A: This antenna is designed for 4G LTE/5G Sub6G cellular bands. If Wi-Fi functionality is required, it is recommended to configure a separate Wi-Fi antenna, as sharing the same antenna may cause interference and degrade cellular communication performance.

Q2: The body-worn camera has an irregular internal cavity; does the antenna support custom cutting to fit such shapes?

A: Supports custom cutting. The client provides 3D drawings of the casing, and we assess the available space to propose a shape design, complete prototyping, and conduct real-world testing on full device fit.

Q3: Are there any other ways to secure an FPC antenna besides using adhesive backing?

A: For mass production of body-worn cameras with compact housings, industrial adhesive bonding is the mainstream method. ZIF connectors occupy significant space and are rarely used; screw clamping over the antenna conductor area is strictly prohibited, as it may damage the antenna and lead to failure upon impact.

Q4: Is poor 4G/5G signal on a body-worn camera always due to antenna quality issues?

A: Not necessarily. Most signal issues stem from insufficient clearance, antennas being close to metallic interference sources, loose connectors, or lack of human body simulation. Engineers can reproduce the operating conditions to accurately identify the root cause of the problem.

Q5: Is factory audit supported? Can qualification documents be provided to third parties?

A: On-site factory audits are supported upon appointment. Electronic versions of ISO, RoHS, CE, FCC, and batch testing reports are available; for police procurement bidding, stamped paper copies can be provided.

Corporate entity information

Shenzhen Qianmu Communication Technology Co., Ltd. has been dedicated to the research, development, and manufacturing of built-in RF antennas for over a decade, specializing in antennas for body-worn cameras, wearable devices, and IoT FPC industrial applications. Integrating R&D, production, and international trade sales, the company provides one-stop RF antenna solutions—including samples, custom development, and large-scale supply—for security equipment integrators, law enforcement equipment brands, and overseas ODM/OEM clients.

Company Address: Room 425, 443, 4th Floor, Building A, Huafeng Zhigu Hangcheng High-Tech Industrial Park, No. 3 Aviation Road, Sanwei Community, Hangcheng Subdistrict, Bao'an District, Shenzhen City, Guangdong Province Phone: 0755-21633653 Email: qianmu188@126.com Support Services: Free sample testing, 3D structural antenna evaluation for new projects, RF technical support, complete export/policing certification documentation