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Engineering & Quality

Engineering Capability and Quality System

Competitiveness in RF components comes down to three things: whether it can be designed, whether it can be built consistently, and whether it can be verified clearly. We staff and equip all three stages.

Design is supported by 20 R&D engineers whose core members have more than 20 years of RF experience, covering electromagnetic simulation, topology selection, cavity structure and thermal design. Process engineering addresses cavity miniaturization and batch consistency; manufacturing covers assembly, tuning and burn-in.

Quality is governed by two systems at once — ISO 9001 and GJB 9001C-2017. Test equipment includes vector network analysers, PIM test systems and thermal chambers, and every unit is tested for insertion loss, rejection, VSWR, intermodulation and amplitude / phase tracking before release.

RF filter designFull-cavity 3D simulationMultipactionCavity miniaturizationGJB 9001C-2017ISO 9001PIM test
R&D Team & Simulation

Simulation First

Filter design is fundamentally a search for a solution under a set of conflicting constraints. Our approach is to put the constraints into a model and solve them there before deciding whether hardware should be built.

1

Team. More than 20 engineers, with core members holding over twenty years of RF experience. The company has invested several million RMB in R&D hardware and software, and in automated test equipment including PIM test sets and high-power / high-frequency test systems.

2

Full-cavity 3D simulation. Design does not rely on physical trial and error: the complete cavity is simulated in a 3D model to obtain the response quickly, improving both design efficiency and accuracy. Structure, materials and fields are solved in the same model, avoiding the cumulative error of estimating them separately.

3

Material and reliability studies. Different materials have different temperature behaviour, which translates directly into frequency drift; power handling and multipaction are likewise strongly dependent on material choice and structural form. These are modelled separately at design stage to confirm stability and reliability under real operating conditions.

4

Where simulation ends. The value of simulation is to move trial-and-error cost from hardware to model, but it does not replace testing. Every key specification we commit to is delivered on measured data.

The basic constraint: of performance, power and volume, only two can normally be obtained at once. This is not a question of design skill but a physical limit — every technical path taken is an answer to the question of which one to give up first.
GCT R&D laboratory RF component development
Comprehensive Capability

Design · Process · Manufacturing

Getting from system specification to a conforming product means passing through three gates. They are not independent: the choice made at one gate fixes the space available at the next.

Design

Concept selection
Several filter forms compared in parallel and selected from what is achievable, rather than a single template applied by default. Once the topology is fixed, the available process space is fixed with it.
Specification breakdown
System requirements decomposed first, then balanced across modules so that no individual stage is over-designed.
Passive theory
Field distribution, structural design and material use intersect — a genuinely multi-disciplinary problem that needs theory and engineering experience together.

Process

Performance-related process
Intermodulation and multipaction are strongly process-dependent and must be planned at design stage. Correcting them after hardware exists is expensive and may not be possible.
Fabrication methods
Selective plating, injection moulding and new materials are used to buy space in performance, volume or cost, with the trade decided by project constraints.
Surface treatment
Silver plating of resonators and cavity walls reduces conductor loss; differences in plating method show up directly in achieved Q.

Manufacturing

Joining
High-frequency soldering, laser sealing and automated welding selected to suit the structure. Joint quality determines the electrical consistency of cavity contact interfaces, with a direct effect on PIM.
Tuning
Design and assembly precision allow fine tuning or no tuning at all, shifting consistency from operator experience to structure and tooling.
Test
S-parameters, PIM and reliability testing form the release criteria, recorded item by item and traceable to a specific batch and process step.

A multi-disciplinary problem by nature

Developing and manufacturing RF and microwave components cannot be covered by a single discipline. Field distribution determines electrical performance; structural design determines mechanical and thermal behaviour; material selection affects temperature drift and power handling; chemical surface treatment bears on loss and intermodulation; and production process ultimately determines batch consistency. All five have to advance together — if any one falls behind, the result shows up as a specification that fails to meet target.

Production Test

Four Inspection Stages, Not Only a Final Gate

Inspection points are distributed across incoming material, in-process, finished product and environmental stages. With final inspection only, problems surface too late and rework cost multiplies.

Incoming and in-process

Incoming material
Material condition and plating quality confirmed before production begins, so defects are not carried all the way to the finished stage.
In-process inspection
Inspection points at welding and assembly, concentrated on the areas and operations that are sensitive to intermodulation.
Assembly precision
Automated screwdriving and similar tooling control assembly torque, reducing the electrical spread caused by human variation.

Finished product, electrical

S-parameters
Insertion loss, return loss, VSWR and in-band ripple measured on every unit, with recalibration before test so the figures are trustworthy.
PIM
Passive intermodulation measured under two-tone excitation — a test that also serves as a check on contact-interface assembly quality.
Amplitude / phase tracking
Cross-batch sampling, with full temperature-range re-measurement for phased array products to confirm batch consistency rather than single-unit compliance.

Environment and reliability

Temperature
Temperature cycling in thermal chambers confirms performance retention and delay stability over the full operating range.
Burn-in screening
Burn-in chambers expose early-life failures at material and structural level, reducing the probability of field failure.
Specialist systems
PIM test equipment and high-power / high-frequency test systems carry out dedicated verification of intermodulation and power handling.

Principal instruments and equipment

Electrical measurement is based on vector network analysers, spectrum analysers and signal generators, with intermodulation handled by dedicated PIM test sets. Production uses induction welding, automated welding machines and automated screwdrivers. Environmental and reliability work relies on thermal and burn-in chambers, while PIM test equipment and high-power / high-frequency test systems support specialist verification and automated testing.

Quality System

Quality System and Batch Consistency

Two quality management systems

Our quality system satisfies two standards simultaneously: ISO 9001 on the general side, and GJB 9001C-2017, the Chinese quality management standard for military equipment. The scope of certification covers the full cycle of development, production and service of RF passive components for communication equipment — not one product category.

GB/T 19001-2016 / ISO 9001:2015 GJB 9001C-2017

Batch consistency — every unit, not the best unit

Phased array applications demand more consistency than they do single-unit extremes. We manage consistency as a system metric: process margin reserved at design stage, assembly torque, plating and structural precision controlled in process, cross-batch sampling at test and full temperature-range re-measurement in a thermal chamber. In delivered programmes, batch phase tracking reaches ±1°, and ±1.6° over the full temperature range.

How the system reaches the product

Design review → process control → production test → reliability verification, each with defined records and acceptance conditions. A measured figure is not accepted simply because it was measured: it is compared item by item against the design input, and any deviation is traced to a specific operation rather than handled as a result alone.

ISO 9001 certificate GJB 9001C-2017 certificate
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GCT · Guangdong General Communication Technology

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👤ANDY
Guangdong General Communication Technology Co., Ltd. · Shenzhen Gaogeqi Technology Co., Ltd.
📍Room 702, 7/F, Building 21, Tongde Intelligent Manufacturing Park Phase II, No.1 Dawei Road, Shangjiashi Community, Ronggui Subdistrict, Shunde District, Foshan, Guangdong, China
✉️Email: 39124284@qq.com
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