Chapter 1194 It Would Be Best if We Could Contact Academician Chang

Bistatic radar is not a new concept to these people here.

To put it simply, as long as the transmitter and receiver are separated, it can become the simplest bistatic radar.

In addition, in actual operation, the transmitter does not necessarily need to exist independently.

Sometimes non-cooperative signals can also be used for detection.

In fact, the radar improvement plan proposed by Chang Haonan many years ago for anti-stealth purposes can also be regarded as a simple version of bistatic radar.

However, at that time, the reason for such a move was that anti-stealth was secondary.

The main purpose is to ensure the concealment and suddenness of detection, so as not to be physically suppressed by the EA6B on standby in the adjacent airspace.

It is not exactly the same as the current application scenario.

Of course, most of the leaders of the Air Force's command line are pilots and are not radar system experts, so the deeper details are basically no longer clear.

Chief of Staff He Rong on the side took two puffs of cigarette, burning the fire at the end of the cigarette bright red:

"If nothing else is done, as long as the radars are deployed separately, the detection capability of low RCS can be improved?"

When he asked this question, the first thing he thought of was those old radars from half a century ago.

Unlike modern radar systems that are highly integrated, many older models are designed with their transmitters and receivers separated.

At that time, it was just because the power consumption and size of the components were too large that they could not be packed together.

But if it is true as the other party said, wouldn't it be easier to detect stealth aircraft by bringing in some old-fashioned radars?

Li Jianqiang rarely experienced such a big posture. Although he inevitably showed some timidity, he still kept his composure:

"Although stealth aircraft will use wave-absorbing paint on the outer layer to directly weaken the energy of the incident radar waves, the most important stealth measure is through the shape design so that the incident radar waves do not return along the original path, but are deflected and scattered by the waves. In other directions, these clutters are almost undetectable by traditional monostatic radars, but bistatic or multistatic radars can take advantage of them.”

"Of course, the scattered electromagnetic wave beam is very narrow and has irregular intensity, which can easily be regarded as background clutter and is almost impossible to receive continuously. However, the new radar developed since the 1990s is very flexible and can adjust the filtering method according to the actual situation. At least there is considerable operability in the field of remote early warning..."

He Rong realized that he should have simplified things:

"So...this dual-base or multi-base deployment model also has certain requirements for the radar itself?"

Li Jianqiang's performance now was much smoother than before, and he nodded immediately:

"That's natural, and the bistatic mode also has requirements for the deployment locations of the receiver and transmitter."

"For example, when the bibase angle formed by the target and the transmitting and receiving base is near 180°, it will induce forward scattering of the target. Regardless of whether it is coated with absorbing paint, its RCS will increase significantly."

"In addition, when the target approaches the bistatic radar baseline from any direction, a Doppler beat phenomenon will occur. Its Doppler frequency is zero at the moment it crosses the baseline. This zero can be detected using a beat frequency receiver. Beat the frequency, record the moment when it occurs, and then calculate the target's trajectory through multi-point calculation..."

The further he went on, the more the eyes of the leaders in front of him lit up, and they obviously had high expectations for this plan.

This made Li Jianqiang feel a little guilty again.

So I added an extra sentence at the end:

"Of course, these are conclusions at the principle level. To truly realize the anti-stealth effect of multi-base radar, detailed analysis is required based on actual needs and specific conditions."

But the effect of this sentence is obviously not very good. Qiao Chenqing, Deng Changyou and He Rong looked at each other several times, and they all saw the same answer in each other's expressions:

"Comrade Jianqiang, don't be discouraged. It's good if you have principles."

As political commissar, Deng Changyou was no longer popular, so he re-entered his own role and began to do ideological work:

"According to the press conference there, the F22 will fly to Okinawa only after it is announced that it has achieved initial combat capability. There should be more than a month in between. Although it is definitely too late to develop new equipment from scratch, the new tactics are still There is some room for maneuver..."

At this time, Qiao Chenqing also picked up what his old partner said:

"Of course, we don't necessarily have to use your idea to catch the opponent. There will be other means that work together. If that doesn't work, we can also combine naval aviation and mobilize some units from inland airports to increase the frequency of takeoff response. "

"But this time, it is definitely a rare opportunity to have someone else's latest aircraft in service as a training partner. As the saying goes, it is a mule or a horse, just pull it out and run around... Also, if you have any requests, you can put them forward now, and we will also I will fully support you.”

Li Jianqiang knew very well that this was definitely an excellent opportunity for him.

Therefore, he calmed down a little, and then quickly searched in his mind:

"To increase the probability of capturing low RCS targets, we'd better deploy a Z-shaped radar network, so at least four radars of the same model are needed, preferably new models that have been equipped with troops in recent years."

This is certainly a reasonable request.

It is impossible to let the horse run without letting it eat grass. Besides, the Air Force has had a much better life in the past two years. I dare not say more. It is not a problem to transfer four radars.

Qiao Chenqing immediately waved his hand to express his agreement.

"In addition, the best radar deployment location still needs to be calculated in detail. We will comprehensively consider the convenience of deployment and detection capabilities, but the physical principles are beyond human control. The final calculated result is likely to be around the city. You see..."

Faced with this request, several leaders were not as decisive as before.

On the one hand, although the stage of the army's patience has passed, the top priority today is still economic construction, and the army is still in a weak position in the coordination between the army and the local government.

It is not easy to coordinate with local departments, especially local departments in coastal areas, for such sensitive land use issues.

On the other hand, dragging new radars around in the city is really not conducive to the implementation of confidentiality and security work.

"We will try our best to ensure that your test phase is not disturbed, but if possible, we will try to deploy the radar in a relatively remote location."

Deng Changyou gave a relatively conservative answer, and then gestured to Li Jianqiang:

"Go on."

This time, the latter hesitated a little:

"Also... it would be best to contact Academician Chang."

Qiao Chenqing, who was writing down his head, paused:

"You mean... Academician Chang Haonan?"

Li Jianqiang nodded:

"Many of the tools and theories we use in our research are based on his research results, so there are some places that we don't understand as well as the proposer himself... Academician Chang is very busy now. If I contact him privately through personal channels, he may not be able to receive the news quickly. Now is a time to race against time, so..."